Find the missing number so that the equation has infinitely many solutions.
-5x +_____= -5x − 7

Answers

Answer 1
To have infinitely many solutions, we need the equation to be an identity, which means the left-hand side must simplify to the same expression as the right-hand side.

Starting with -5x + __ = -5x - 7, we can simplify the left-hand side by subtracting the -5x from both sides:
-5x + __ -(5x) = -5x - 7 - (-5x)

Simplify further, we get:

__ = -7

So the missing number is -7, and the equation is -5x - 7 = -5x - 7, which is an identity and has infinitely many solutions.

Related Questions

16 Find the value of each variable in the parallelogram.
15 9

b-1 5a

Answers

The value of each variable in the parallelogram are g = 61 and h = 9

Finding the value of each variable in the parallelogram.

From the question, we have the following parameters that can be used in our computation:

The parallelogram

The opposite angles of a parallelogram are equal

So, we have

g + 4 = 65

This gives

g = 61

Next, we have

16 - h = 7

So, we have

h = 16 - 7

Evaluate

h = 9

Hence, the value of each variable in the parallelogram are g = 61 and h = 9

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Sharla wanted to know how many minutes per hour a radio station typically plays music. She collected the following data from


stations,


Radio Station Music


36


30 31 32 33 34 35


Minutes per Hour


By how many minutes would her median time change if she added another radio station playing 37 minutes?


O A.


0. 45


OB.


0. 5


OC.


the median did not change


OD.


0. 4

Answers

Median time change in 0.5 minutes if she added another radio station playing 37 minutes

To determine how many minutes the median time would change after adding a radio station playing 37 minutes of music per hour, follow these steps:

1. Arrange the given data in ascending order:
30, 31, 32, 33, 34, 35, 36

2. Find the median of the original data:
There are 7 data points, so the median is the middle value: 33 minutes.

3. Add the new radio station data (37 minutes) and arrange in ascending order:
30, 31, 32, 33, 34, 35, 36, 37

4. Find the new median after adding the radio station:
There are now 8 data points, so the median is the average of the two middle values (32 and 33): (32 + 33) / 2 = 32.5 minutes.

5. Determine the change in the median:
New median (32.5) - Original median (33) = -0.5

So, by adding another radio station playing 37 minutes of music per hour, her median time would change by -0.5 minutes (or decrease by 0.5 minutes). The correct answer is B. 0.5 minutes.

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A restaurant owner rejects his produce shipment if he finds more than 3 crates with any bruised
or spoiled food in it. The probability that a crate has bruised or spoiled food in it is 0.11. What
is the probability that he will reject a shipment of 15 crates?

Answers

This is a binomial distribution problem where the probability of success (finding a bruised or spoiled crate) is 0.11 and the number of trials is 15. The restaurant owner will reject the shipment if he finds more than 3 bruised or spoiled crates.

The probability of finding 0, 1, 2, or 3 bruised or spoiled crates in a shipment of 15 crates is:

P(X = 0) = (15 choose 0) * (0.11)^0 * (0.89)^15 = 0.27
P(X = 1) = (15 choose 1) * (0.11)^1 * (0.89)^14 = 0.39
P(X = 2) = (15 choose 2) * (0.11)^2 * (0.89)^13 = 0.25
P(X = 3) = (15 choose 3) * (0.11)^3 * (0.89)^12 = 0.09

The probability of finding more than 3 bruised or spoiled crates is:

P(X > 3) = 1 - P(X ≤ 3) = 1 - (P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3))
= 1 - (0.27 + 0.39 + 0.25 + 0.09) = 0.01

Therefore, the probability that the restaurant owner will reject a shipment of 15 crates is 0.01 or 1%.

- My family wants to start a food business. Every Sunday, the family prepares the best dishes. We need a loan to start our business as a family. We decided to get an SBA Loan and they offered a PPP (Paycheck Protection Program) loan option. The initial amount will be 20,000. This loan has an interest 4. 5% compounded quarterly. What will be the account balance after 10 years?



I’ll mark as BRANLIEST!!



35 POINTS!!

Answers

This loan has an interest 4. 5% compounded quarterly, account balance after 10 years:

The initial loan amount is $20,000, and it has an interest rate of 4.5% compounded quarterly. You would like to know the account balance after 10 years.

To calculate the account balance, we will use the compound interest formula:

A = P(1 + r/n)^(nt)

Where:


A = the future value of the loan
P = the initial loan amount ($20,000)


r = the annual interest rate (0.045)
n = the number of times the interest is compounded per year (4, since it is compounded quarterly)


t = the number of years (10)

Plugging in the values:

A = 20000(1 + 0.045/4)^(4*10)

A = 20000(1.01125)^40

A ≈ 30,708.94

The account balance after 10 years will be approximately $30,708.94.

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Solve for This and please provide step by step on how to do it please

Answers

The equation [tex]\frac{y+6}{y-1}+\frac{y-4}{y^2-y} = \frac{1}{y-1}[/tex] when solved for y is -3 ± √13

Calculating the equation for y

From the question, we have the following parameters that can be used in our computation:

[tex]\frac{y+6}{y-1}+\frac{y-4}{y^2-y} = \frac{1}{y-1}[/tex]

Simplify the denominators

So, we have

[tex]\frac{y+6}{y-1}+\frac{y-4}{y(y-1)} = \frac{1}{y-1}[/tex]

This gives

y + 6 + (y - 4)/y = 1

Subtract 1 from both sides

y + 5 + (y - 4)/y = 0

So, we have

y² + 5y + y - 4 = 0

Evaluate

y² + 6y - 4 = 0

When solved, we have

[tex]y = \frac{-b \pm \sqrt{b^2 -4ac} }{2a}[/tex]

So, we have

[tex]y = \frac{-6 \pm \sqrt{6^2 -4(1)(-4)} }{2(1)}[/tex]

Evaluate

[tex]y = \frac{-6 \pm \sqrt{52} }{2}[/tex]

Evaluate

[tex]y = -3 \pm \sqrt{13}[/tex]

Hence, the solution is -3 ± √13

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My bestfriend has parents that are 11 years apart. She's 12. How old are her parents?

Answers

The younger parent is at least 1 year old, and the older parent is 23 years old.

If your best friend's parents have an age gap of 11 years, then we can assume that one of them is 11 years older than the other. Let's call the younger parent "X" years old. Then the older parent must be X + 11 years old. Since your best friend is 12 years old, we know that both of her parents are older than 12. Therefore, we can set up an equation:

X + (X + 11) > 12

Simplifying this, we get:

2X + 11 > 12

2X > 1

X > 0.5

Since X must be a whole number (you can't have half a year of age), we know that X must be at least 1. Therefore, the younger parent is at least 1 year old. Using our equation, we can find the age of the older parent:

X + 11 = 12 + 11 = 23

Therefore, the younger parent is at least 1 year old, and the older parent is 23 years old.

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Gazza and Julia have each cut a rectangle out of paper. One side is 10 cm. The other side is n cm. (a) They write down expressions for the perimeter of the rectangle. Julia writes Gazza writes 2n+20 2(n + 10) Put a circle around the correct statement below.
Julia is correct and Gazza is wrong.
Gazza is correct and julia is wrong.
Both are correct.
Both are wrong.​

Answers

The correct statement regarding the perimeter of the rectangle is given as follows:

Both are correct.

What is the perimeter of a polygon?

The perimeter of a polygon is given by the sum of all the lengths of the outer edges of the figure, that is, we must find the length of all the edges of the polygon, and then add these lengths to obtain the perimeter.

The rectangle in this problem has:

Two sides of n cm.Two sides of 10 cm.

Hence the perimeter is given as follows:

2 x 10 + 2 x n = 2 x (10 + n) = 20 + 2n = 2n + 20 cm.

Hence both are correct.

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You earn $130.00 for each subscription of magazines you sell plus a salary of $90.00 per week. How many subscriptions of magazines do you need to sell in order to make at least $1000.00 each week?

Answers

The subscriptions of magazines you need to sell is at least 7

How many subscriptions of magazines do you need to sell?

From the question, we have the following parameters that can be used in our computation:

Earn $130.00 for each subscription of magazines You sell plus a salary of $90.00 per week

Using the above as a guide, we have the following:

f(x) = 130x + 90

In order to make at least $1000.00 each week, we have

130x + 90 = 1000

So, we have

130x = 910

Divide by 130

x = 7

Hence, the number of orders is 7

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A consumer advocacy group suspects that a local supermarket's 1 bag of sugar weigh less than _____ grams. The group tooka a random sample of _____ such packages, weighed each one, and found the mean weight for the sample to be ____ grams with a standard deviation of _____ grams. Using _____ % significance level, would you conclude that the mean weight is less than _____ grams?

Answers

A consumer advocacy group suspects that a local supermarket's 750 grams of sugar actually weigh less than 750 grams. The group took a random sample of 20 such packages, weighed each one, and found the mean weight for the sample to be 746 grams with a standard deviation of 8 grams. Using 10% significance level, would you conclude that the mean weight is less than 750 grams.

What is the hypothesis?

To test if the mean weight is said to less than 750 grams, we can carry out a one-sample t-test by the use of  the sample mean, sample standard deviation, as well as sample size.

The null hypothesis =  750 grams,

The  alternative hypothesis=  less than 750 grams.

so we need to calculate the test as:

t = (746 - 750) / (8 / √(20)) = -2.236

Next, we have to find the critical t-value for a one-tailed test with 19 degrees of freedom (so  n-1 =19)

When you a t-distribution table, the critical t-value to be -1.734.

Therefore, know that -2.236 < (less than) -1.734,  so you will reject the null hypothesis and say that the mean weight is less than 750 grams at a 10% significance level.

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The start of an arithmetic sequence is 29, 17, 21, 25, The rule for the sequence can be written in the form xn=cn+d, where c and d are numbers. a) By first calculating the values of c and d, work out the rule for the sequence. b) What is the value of x11?​

Answers

Answer:

Step-by-step explanation:

The value of 2s in 43,290 is 2,000, while the value of 2s in 32,865 is 20.

B. 200 is 1/20 the value of 2,000.

This statement is correct, as 200 is 1/10 of 2,000, and there are two 0s in the value of 2s in 43,290 compared to one 0 in the value of 2s in 32,865.

We want to find the mass of a solid 8 enclosed within a sphere of radius 1 centred at 2 the origin whose density is given by 8(x, y, z) 1 + (x2 + y2 + 22)3/2 Recall that the mass of B is given by the triple integral [S]_568, , z) AV. Since the region of integration is spherical, we will use spherical coordinates to carry out our work. (a) What is the density 8 as a function of spherical coordinates, that is, as a function of p. 0, and ? (Use the Vars tab that appears when you click in the answerbox, or you may type in rho, theta, or phi, respectively.) Answer: 8(0,0,0) (b) In spherical coordinates the bounds of integration for p. 0, and 6 are given by SP SOS sºs (C) What is the mass of the solid ? (If you enter your answer using a decimal approximation, then round your answer to three decimal places.)

Answers

A. 8(p, phi, theta) = 8p sin(phi) cos(theta) / (1 + p^2 + 2p cos(phi))^(3/2)

B. ∫0^(2π) ∫0^π ∫0^1 8p sin(phi) cos(theta) / (1 + p^2 + 2p cos(phi))^(3/2) p^2 sin(phi) dp d(phi) d(theta)

C. the mass of the solid 8 enclosed within the sphere is approximately 8.378.

(a) Using the conversion formulas for spherical coordinates, we have:

x = p sin(phi) cos(theta)
y = p sin(phi) sin(theta)
z = p cos(phi)

Substituting these expressions into the given density function, we get:

8(x, y, z) = 8(p sin(phi) cos(theta), p sin(phi) sin(theta), p cos(phi))
            = 8p sin(phi) cos(theta) / (1 + p^2 + 2p cos(phi))^(3/2)

Therefore, the density 8 as a function of spherical coordinates is:

8(p, phi, theta) = 8p sin(phi) cos(theta) / (1 + p^2 + 2p cos(phi))^(3/2)

(b) Since the solid 8 is enclosed within a sphere of radius 1 centred at 2 the origin, we have:

0 ≤ p ≤ 1
0 ≤ theta ≤ 2π
0 ≤ phi ≤ π

Therefore, the bounds of integration in spherical coordinates are:

∫0^(2π) ∫0^π ∫0^1 8p sin(phi) cos(theta) / (1 + p^2 + 2p cos(phi))^(3/2) p^2 sin(phi) dp d(phi) d(theta)

(c) Evaluating the triple integral using a computer algebra system or numerical integration, we get:

M = 8π/3

Therefore, the mass of the solid 8 enclosed within the sphere is approximately 8.378.

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12
Find the lowest common multiple (LCM) of 28, 42 and 63
Show your working clearly.

Answers

Answer:

Least Common Multiple (LCM) of 28,42,63 is 252 ∴ So the LCM of the given numbers is 2 x 3 x 7 x 2 x 1 x 3 = 252

Step-by-step explanation:

Answer:

252 is the answer

Step-by-step explanation:

find the multiples of all of them ( and make sure it is the least. )

28:

28, 56, 84, 112, 140, 168, 196, 224, 252, 280, 308

42:

42, 84, 126, 168, 210, 252, 294, 336

63:

63, 126, 189, 252, 315, 378

bolded + undurlined is the answer

you see that 252 is the answer

252 is the answer

Which correctly describes how to graph the equation shown below?
y=1/4x
Start with a point at (1, 4). Then go up 1 and 4 to the right.
Start with a point at (1, 4). Then go up 4 and 1 to the right.
Start with a point at (0, 0). Then go up 4 and 1 to the right.
Start with a point at (0, 0). Then go up 1 and 4 to the right.

Answers

The statement which correctly describes how to graph the equation shown above include the following: Start with a point at (0, 0). Then go up 1 and 4 to the right.

What is a translation?

In Mathematics, the translation a geometric figure or graph to the right simply means adding a digit to the value on the x-coordinate of the pre-image while the translation a geometric figure or graph upward simply means adding a digit to the value on the y-coordinate (y-axis) of the pre-image.

In Mathematics and Geometry, the translation a geometric figure upward simply means adding a digit to the value on the positive y-coordinate (y-axis) of the pre-image;

g(x) = f(x) + N

g(x) = y = 1/4(x)

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Divide.

Simplify your answer as much as possible.

Answers

The polynomial expression becomes -20vz⁶ + 36v⁴z⁵ + 24v⁶ z⁶

How did we arrive at the above?

In order to divide, first collect the like terms and then perform the operation. So, we have:

(-20vz⁶ + 32v⁴z⁵ +24v⁶ z⁶) + (4v⁴ z⁵) = -20vz⁶ + (32v⁴z⁵ +4v⁴ z⁵) + 24v⁶ z⁶

Simplifying the expression in parentheses, we get:

32v⁴z⁵ +4v⁴ z⁵ = 36v⁴z⁵

So, the expression becomes:

-20vz⁶ + 36v⁴z⁵ + 24v⁶ z⁶

This expression cannot be simplified any further.

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PLEASE HELP
What is the probability that
both events will occur?
Two dice are tossed.
Event A: The first die is a 1 or 2
Event B: The second die is 4 or less
P(A and B) = P(A) • P(B)
P(A and B) = [?]
Enter as a decimal rounded to the nearest hundredth.

Answers

To find the probability that both events A and B will occur, we need to multiply the probabilities of each event happening separately.

The probability of event A (the first die being a 1 or 2) is 2/6 or 1/3, since there are two out of six possible outcomes where the first die is a 1 or 2.

The probability of event B (the second die being 4 or less) is 4/6 or 2/3, since there are four out of six possible outcomes where the second die is 4 or less.

Therefore, the probability of both events A and B occurring is:

P(A and B) = P(A) * P(B)
P(A and B) = (1/3) * (2/3)
P(A and B) = 2/9

Rounded to the nearest hundredth, the probability is 0.22. So, the answer is 0.22.

The probability that both events will occur is 0.22.

What is probability?

It is the chance of an event to occur from a total number of outcomes.

The formula for probability is given as:

Probability = Number of required events / Total number of outcomes.

Example:

The probability of getting a head in tossing a coin.

P(H) = 1/2

We have,

The probability of Event A is 2/6 or 1/3

(since there are two ways to get a 1 or 2 on a six-sided die).

The probability of Event B is 4/6 or 2/3

(since there are four ways to get a number 4 or less on a six-sided die).

Using the formula for the probability of the intersection of two independent events.

P(A and B)

= P(A) x P(B)

= (1/3) x (2/3)

= 2/9

Rounded to the nearest hundredth,

The probability that both events will occur is 0.22.

Thus,

The probability that both events will occur is 0.22.

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Which graph represents the function f {x} = -log (x-1) + 1?

Graph A
Graph B
Graph C
Graph D

Answers

The correct answer is graph D.

what the answear to y=4x-9

Answers

The ordered pairs of the linear expression y = 4x - 9 is (0, -9)

What are the ordered pairs of the linear expression

From the question, we have the following parameters that can be used in our computation:

The linear expression y = 4x - 9

To determine the ordered pairs of the linear expression, we set x to any value say x = 0 and then calculate the value of y

Using the above as a guide, we have the following:

y = 4(0) - 9

Evauate

y = -9

Divide both sides by 1

y = -9

This means that the value of y is equal to -9

So, we have (0, -9)

Hence, the ordered pairs of the linear expression is (0, -9)

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1. Existence of limit (a) Determine whether the following limit exists. If yes, find the limit. If no, give a reasonable explanation * + 2y + 3xy lim (.)+(0,0) * + 3y (b) Determine whether the following limit exists. If yes, find the limit. If no, give a reasonable explanation zy2 lim (x,)+(0,0) 2.4 +y Page 2 (c) Determine whether the following function is continuous at (x,y) = (0,0). Give a reasonable explanation. Hint: Try applying the absolute value to f(x,y) and finding another function g(x,y) such that 0 <\/(x,y) = g(x,y). Use this bounding function g to say what happens to the absolute value (x,y). Here you should apply what's called the sandwich (or squeeze) theorem. o if (x,y) = (0,0) Note: If the function is continuous at (0,0), then 2 lim = 0. (x,y)+(0042 + y2 Observe that ?? <** + y for all 1,9,80 s i. This implies |/(x,y) S (xy|for all 2, y. Page 3

Answers

a) To determine if the limit exists, we need to check if the limit from all directions approaching (0,0) are equal. Let's approach (0,0) along the x-axis first, so y = 0:

lim (x,y)->(0,0) [(x) + 2(y) + 3(x)(y)]
= lim x -> 0 [(x) + 2(0) + 3(x)(0)] = lim x -> 0 x = 0

Next, let's approach (0,0) along the y-axis, so x = 0:

lim (x,y)->(0,0) [(x) + 2(y) + 3(x)(y)]
= lim y -> 0 [(0) + 2(y) + 3(0)(y)] = lim y -> 0 2y = 0

Now, let's approach (0,0) along the line y = mx, where m is some constant:

lim (x,y)->(0,0) [(x) + 2(y) + 3(x)(y)]
= lim x -> 0 [(x) + 2(mx) + 3(x)(mx)]
= lim x -> 0 [(1+3m)x + 2mx^2]
= 0 if m=0, and DNE (does not exist) for all other values of m.

Since the limit is not equal from all directions, the limit DNE at (0,0).

b) To determine if the limit exists, we need to check if the limit from all directions approaching (0,0) are equal. Let's approach (0,0) along the x-axis first, so y = 0:

lim (x,y)->(0,0) [(2.4) + (y)]
= lim x -> 0 [(2.4) + (0)] = 2.4

Next, let's approach (0,0) along the y-axis, so x = 0:

lim (x,y)->(0,0) [(2.4) + (y)]
= lim y -> 0 [(2.4) + (y)] = 2.4

Now, let's approach (0,0) along the line y = mx, where m is some constant:

lim (x,y)->(0,0) [(2.4) + (y)]
= lim x -> 0 [(2.4) + (mx)]
= 2.4 if m=0, and DNE (does not exist) for all other values of m.

Since the limit is equal from all directions, the limit exists and is equal to 2.4 at (0,0).

c) To determine if the function is continuous at (0,0), we need to check if the limit as (x,y) approaches (0,0) of f(x,y) exists and is equal to f(0,0).

Let g(x,y) = sqrt(x^2 + y^2), which satisfies 0 <= |(x,y)| <= g(x,y) for all (x,y). We have:

|f(x,y)| = |(x+y)/(4+x^2+y^2)| <= |(x+y)/4| <= (1/4)g(x,y)

So, we can bound f(x,y) by (1/4)g(x,y). By the sandwich (or squeeze) theorem, we have:

lim (x,y)->(0,0) (1/4)g(x,y) = 0

Thus, by the sandwich theorem, we have:

lim (x,y)->(0,0) f(x,y) = 0

Since the limit exists and is equal to f(0,0) = 0, the function is continuous at (0,0).

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I went to two different banks to find the best savings program. td bank offered my 6% interest for 7 years and wells fargo offered me 5% interest for 9 years. if i deposit $10,000, which bank has the better program to make me the most money? how much more money will i make at one bank than the other? round to the nearest dollar.

Answers

The difference between the two banks is you will make $367 more at Wells Fargo than at TD Bank, to determine which bank has the better savings program, let's compare the total interest earned at TD Bank and Wells Fargo.

TD Bank offers a 6% interest rate for 7 years, while Wells Fargo offers a 5% interest rate for 9 years. If you deposit $10,000, we can calculate the total interest earned at each bank using the formula for compound interest:

A = P(1 + r/n)^(nt)

Where A is the future value of the investment, P is the principal amount ($10,000), r is the annual interest rate, n is the number of times interest is compounded per year, t is the number of years, and "^" denotes exponentiation.

Assuming annual compounding (n = 1), the calculations for each bank are as follows:


TD Bank:
A = $10,000(1 + 0.06/1)^(1*7)
A = $10,000(1.06)^7
A = $15,018.93


Wells Fargo:
A = $10,000(1 + 0.05/1)^(1*9)
A = $10,000(1.05)^9
A = $15,386.16


Comparing the two banks, Wells Fargo's savings program will make you the most money, with a future value of $15,386.16. The difference between the two banks is:

Difference = Wells Fargo - TD Bank
Difference = $15,386.16 - $15,018.93
Difference = $367.23



Rounding to the nearest dollar, you will make $367 more at Wells Fargo than at TD Bank. Therefore, Wells Fargo has the better savings program in this scenario.

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Let P be the parallelogram with vertices (-1, -1), (1, -1), (2, 2), (0, 2). Compute S'p xy dA.

Answers

Answer:Area = 2 * 3 = 6 square units

Explanation:

Given:vertices (-1, -1), (1, -1), (2, 2), (0, 2)

 we can use the formula for the area of a parallelogram:Area = 2 * 3 = 6 square units



Area = base * height

First, let's find the base and height of the parallelogram.

The base can be represented by the distance between vertices (-1, -1) and (1, -1), which is 2 units.

The height can be represented by the distance between vertices (1, -1) and (2, 2), which is 3 units.

Now, we can compute the area of the parallelogram:

Area = 2 * 3 = 6 square units

Finally, the integral S'P xy dA represents the double integral of the function xy over the region P.

Every time you practice, you gain more skills.



Conditional:


Hypothesis:


Conclusion:


Converse:


Inverse:


Contrapositive:

Answers

Hypothesis: Every time you practice, you gain more skills.

What happens when you practice?

Conclusion: Gain of skills is a result of practice.

Converse: If you gain more skills, then you practice every time.

Inverse: If you don't practice, then you don't gain more skills.

Contrapositive: If you don't gain more skills, then you don't practice every time.

The hypothesis states that practicing leads to an increase in skills. This can be interpreted as a cause and effect relationship between the two variables.

The conclusion reiterates that gaining skills is a result of practice.

The converse of the statement flips the order of the hypothesis and the conclusion. It states that if you gain more skills, then you must have practiced every time.

This may not be entirely true because there can be other factors that contribute to the gain of skills besides practice.

The inverse of the statement negates both the hypothesis and the conclusion. It states that if you don't practice, then you don't gain more skills.

This statement is true because practice is a necessary condition for gaining skills. However, it doesn't mean that practicing alone guarantees the gain of skills.

The contrapositive of the statement flips the order of the negated hypothesis and the negated conclusion. It states that if you don't gain more skills, then you didn't practice every time.

This statement is also true because if one doesn't practice, they cannot expect to gain more skills.

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City A and City B had two different temperatures on a particular day. On that day, four times the temperature of City A was 7° C more than three times the temperature of City B. The temperature of City A minus three times the temperature of City B was −5° C. The following system of equations models this scenario:

4x = 7 + 3y
x − 3y = −5

What was the temperature of City A and City B on that day?

Answers

The temperature of City A and City B on that day was 4°C and 3°C respectively.

How to solve an equation?

Let x represent the temperature of city A and y represent the temperature of city B.

Four times the temperature of City A was 7° C more than three times the temperature of City B, hence:

4x = 3y + 7

4x - 3y = 7       (1)

The temperature of City A minus three times the temperature of City B was −5° C, hence:

x - 3y = -5        (2)

From both equations, solving simultaneously:

x = 4, y = 3.

The temperature of City A and City B on that day was 4°C and 3°C respectively.

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Use the first three non-zero terms of a Maclaurin series to estimate the integral from 0 to 1 of the cosine of x squared, dx.


0. 905


0. 904


0. 806


1. 16

Answers

Using the first three non-zero terms of a Maclaurin series, the estimated value of the integral from 0 to 1 of the cosine of x squared, dx is 0.905

To estimate the integral from 0 to 1 of the cosine of x squared, dx using the first three non-zero terms of a Maclaurin series, we first need to find the Maclaurin series for cosine of x squared:

cos(x^2) = 1 - x^4/2! + x^8/4! - x^12/6! + ...

The first three non-zero terms are 1, -x^4/2!, and x^8/4!.

Now we can use these terms to estimate the integral from 0 to 1:

∫₀¹ cos(x²) dx ≈ ∫₀¹ [1 - x^4/2! + x^8/4!] dx

Integrating term by term, we get:

∫₀¹ [1 - x^4/2! + x^8/4!] dx ≈ [x - x^5/5! + x^9/9!] from 0 to 1

Plugging in 1 and 0, respectively, and simplifying, we get:

[x - x^5/5! + x^9/9!] evaluated at x=1 - [x - x^5/5! + x^9/9!] evaluated at x=0

= [1 - 1/120 + 1/6561] - [0 - 0 + 0]

≈ 0.905

Therefore, the estimated value of the integral from 0 to 1 of the cosine of x squared, dx using the first three non-zero terms of a Maclaurin series is 0.905.

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pyramid A and pyramid B are similar. find the surface area of pyramid B to the nearest hundredth.

Answers

The surface area of pyramid B to the nearest hundredth is 58.67 cm²

What are similar figures?

Similar figures are two figures having the same shape. The ratio of the corresponding sides of similar shapes are equal.

The scale ratio of the height of the pyramid A to B is

9/6 = 3/2

Area factor = (3/2)² = 9/4

9/4 = 132/x

9x = 132×4

9x = 528

divide both sides by 9

x = 528/9

x = 58.67cm²

Therefore the surface area of pyramid B is 58.67cm².

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Triangle ABC is similar to triangle DBE. Select the responses that make the statements true. Large triangle A B C with side length 7. 5. Smaller triangle D B C inside A B C, which shares vertex B. Side B E has length 5 and base D E has length 13

Answers

The correct responses are: "Triangle DBC is similar to triangle ABC" and "The length of side DE is 13."

Since triangle ABC is similar to triangle DBE, we know that the corresponding angles are congruent and the corresponding sides are proportional.

From the given information, we know that side BC of triangle ABC corresponds to side BE of triangle DBE, since they share vertex B. Therefore, we can use the proportion:

BC / BE = AC / DE

Substituting the given values, we have:

BC / 5 = 7.5 / 13

Solving for BC, we get:

BC = (5 x 7.5) / 13 = 2.88 (rounded to two decimal places)

Therefore, the length of side BC is 2.88.

Now we can check which of the given statements are true:

"The length of side AB is 3.75." We do not have enough information to determine the length of side AB, so this statement cannot be determined to be true or false based on the given information.

"Triangle DBC is similar to triangle ABC." This statement is true, since they share angle B and the sides BC and BE are proportional.

"Angle C in triangle ABC is congruent to angle D in triangle DBE." This statement cannot be determined to be true or false based on the given information, since we do not know which angle in triangle DBE corresponds to angle C in triangle ABC.

"The length of side AC is 4.29." This statement cannot be determined to be true or false based on the given information, since we only have information about side BC and side BE. We do not have enough information to determine the length of side AC.

"The length of side DE is 7.8." This statement is false, since the length of side DE is given as 13, not 7.8.

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The value in dollars, v (x), of a certain truck after x years is represented

Answers

The truck would have lost 36% of its initial value.

How we get the initial value?

The value in dollars, v(x), of a certain truck after x years can be represented by a mathematical function or equation. In the absence of a specific equation, it is difficult to provide an answer.

However, I can provide an example of a possible equation that represents the depreciation of a truck's value over time.

Let's assume that the truck loses 20% of its value every year. If the initial value of the truck is V0 dollars, then the value of the truck after x years, Vx, can be represented by the following equation:

Vx = [tex]V0(0.8)^x[/tex]

In this equation, the term [tex](0.8)^x[/tex] represents the percentage of the truck's value that remains after x years of depreciation. For example, after one year, the truck's value would be V1 = [tex]V0(0.8)^1[/tex] = 0.8V0,

which means that the truck would have lost 20% of its initial value. After two years, the truck's value would be V2 = V0[tex](0.8)^2[/tex]= 0.64V0,

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Mr. ream mixes 12 cups of paint in a large bowl. he used the paint to fill 40 small dishes with 2 fluid ounces of paint each. how many cups of paint does mr. ream have left in the bowl

Answers

Mr. Ream has 7 cups of paint left in the bowl.

There are 12 cups of paint, which is equivalent to 192 fluid ounces of paint (1 cup = 16 fluid ounces). Mr. Ream filled 40 small dishes with 2 fluid ounces of paint each, for a total of 80 fluid ounces of paint used (40 x 2 = 80).

Therefore, Mr. Ream has 192 - 80 = 112 fluid ounces of paint left in the bowl.

To convert this to cups, we divide by 16 (1 cup = 16 fluid ounces):

112/16 = 7 cups

Therefore, Mr. Ream has 7 cups of paint left in the bowl.

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A sports arena has 40 soda vendors. Each of whom sells 200 sodas per event. Management estimates that for each additional vendor, the yield per vendor decreases by 4. How many additional vendors should management hire to maximize the number of sodas sold.

Answers

Management should hire 25 additional vendors to maximize the number of sodas sold.

Let x be the number of additional vendors that management hires. Then the total number of vendors is 40 + x, and the yield per vendor is 200 - 4x (since the yield decreases by 4 for each additional vendor).

The total number of sodas sold is the product of the number of vendors and the yield per vendor:

Total sodas sold = (40 + x) * (200 - 4x)

To maximize the number of sodas sold, we take the derivative of this expression with respect to x and set it equal to zero:

d/dx [(40 + x) * (200 - 4x)] =

Expanding and simplifying, we get:

-8x² + 120x + 8000 = 0

Dividing both sides by -8, we get:

x² - 15x - 1000 = 0

Using the quadratic formula, we solve for x:

x = (15 ± sqrt(15² + 411000)) / 2

x = (15 ± 35) / 2

x = -10 or x = 25

Since we can't hire a negative number of vendors, the only sensible solution is x = 25. Therefore, management should hire 25 additional vendors to maximize the number of sodas sold.

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21. Marla is drawing a regular polygon. She has drawn two of the sides with an interior angle of 140°, as shown below. When Marla completes the regular polygon, what should be the sum, in degrees, of the measures of the interior angles?

Answers

The sum of the measures of the interior angles is 1260 degrees

What should be the sum of the measures of the interior angles?

From the question, we have the following parameters that can be used in our computation:

An interior angle = 140 degrees

The sum of interior angles of a regular polygon is:

S = (n - 2) × 180

Where n is the number of sides of a polygon

Also, we have

S = 140n

Substitute the known values in the above equation, so, we have the following representation

140n = (n - 2) × 180

Expand

140n = 180n - 360

This gives

40n = 360

Divide

n = 9

Recall that

S = (n - 2) × 180

So, we have

S = (9 - 2) × 180

Evaluate

S = 1260

Hence, the sum of the measures of the interior angles is 1260 degrees

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70°
is the same as
radians. Round your answer to the nearest thousandth.

Answers

70 degrees to radian is 1.22 radian.

How to convert from degree to radian?

In mathematics,, both degree and radian represent the measure of an angle. One complete anticlockwise revolution can be represented by 2π (in radians) or 360° (in degrees).

Therefore,

360 degrees = 2π radian

where

π = 3.14

Therefore, let's find 70 degrees in radian.

Hence,

360 degrees = 2π radian

70 degrees = ?

cross multiply

angle in radian = 70 × 2π / 360

angle in radian = 140π / 360

angle in radian = 0.38888888888 × 3.14

angle in radian = 1.22 radian

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