Answer:
300
Step-by-step explanation:
Let y = unknown number
30% of y = 90
⇒ 0.3 × y = 90
⇒ y = 90 ÷ 0.3
⇒ y = 300
Please help I need the answer PLEASE!!!
Answer:
245 Sq inches
Step-by-step explanation:
Surface area of the solid
= 7*7 + 4(1/2 * 7*14)
= 49 + 196
= 245 sq in
Find the greatest common factor of 32 and 36
What are the zeros of the polynomial function F(x) = x2 -5x-6?
O A. x= -1 and x = 6
O B. x= -6 and x = 1
O C. x = 2 and x = 3
O D. x= -3 and x = -2
Answer:
C
Step-by-step explanation:
Remark
The zeros are found either by using the quadratic equation or by factoring and equating the factors to 0. I think factoring is the best and simplest way.
Solution
x^2 - 5x + 6 factors into
(x - 3)(x - 2)
-3 and - 2 must multiply to 6 (they do) -3 * -2 = 6
-3 and -2 must also add to - 5. They do. -3 - 2 = - 5
So the factors are correct.
x - 3 = 0
x - 3 + 3 = 0 + 3
x = 3
x-2 = 0
x -2 + 2 = 0 + 2
x = 2
Answer
x = 2 and x = 3
The answer is C
Manufacturers of tires report that tires should be able to last an average of 50,000 miles. A new tire company produces a different type of tread and tests 100 randomly selected tires. This sample of 100 tires lasted an average of 52,000 miles. Assuming the new type of tread does not improve the mileage of the tire, 200 sample means were simulated and displayed on the dotplot.
Using the dotplot and the sample mean mileage, is there convincing evidence that the new type of tread improves the mileage?
Yes, because a mean mileage of 52,000 or more occurred only 7 out of 200 times, the mean mileage is statistically significant. There is convincing evidence the new type of tire tread improves mileage of the tire.
Yes, because a mean mileage of 52,000 or less occurred 193 out of 200 times, the mean mileage is statistically significant. There is convincing evidence the new type of tire tread improves mileage of the tire.
No, because a mean mileage of 52,000 or less occurred 193 out of 200 times, the mean mileage is not statistically significant. There is not convincing evidence the new type of tire tread improves mileage of the tire.
No, because a mean mileage of 52,000 or more occurred 7 out of 200 times, the mean mileage is not statistically significant. There is not convincing evidence the new type of tire tread improves mileage of the tire.
The convincing evidence is Yes, because a mean mileage of 52,000 or more occurred only 7 out of 200 times, the mean mileage is statistically significant.
What is a dot plot?A dot plot is known to have the same characteristics as a bar graph as both are made up of different height of “bar” that consist of dots which is said to be equal to the number of items in any of the stages or categories.
Conclusively, when a person uses a dot plot and the sample mean mileage, one will be able to find a convincing evidence that the new type of tread improves the mileage because out of mean mileage of 52,000 or more, only 7 out of 200 times, took place and this shows that the mean mileage is statistically significant and that the new type of tire tread boast the mileage of the tire.
Therefore, option A is correct.
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Answer:
Theres another question that looks like this one, the awnser to that is
^ ^ ^ ^ ^
No, because a mean mileage of 51,500 or more occurred 14 out of 200 times, the mean mileage is not statistically significant. There is not convincing evidence the new type of tire tread improves mileage of the tire.
Step-by-step explanation:
but the guy above me is correct
Use data sets A, B, and C to answer the question that follows.
A {25, 24, 25, 22, 21, 23, 1}
B: {20, 23, 25, 21, 24, 22, 60}
C. 20, 21, 20, 22, 20, 24, 99}
Which answer shows the standard deviations of the data sets in order from greatest to least?
- C, B, A
-В, А, С
- A, B, C
The correct order which shows the standard deviations of the data sets A,B and C in order from greatest to least is C, B, A.
How to find the standard deviation of a data set?Suppose that
[tex]x_i; \: \: i = 1,2, ... ,n[/tex] are n data values for the given data set.
Then we have: Variance as,
[tex]\sigma^2 = \dfrac{\sum_{\forall x_i} (x_i - \overline{x})^2}{n}[/tex]
As standard deviation is the positive root of variance, thus,
[tex]\sigma = \sqrt {\dfrac{\sum_{\forall x_i} (x_i - \overline{x})^2}{n}}[/tex]
If its sample, we divide by n-1 instead of n
Use data sets A, B, and C to answer the question that follows.
A {25, 24, 25, 22, 21, 23, 1}B: {20, 23, 25, 21, 24, 22, 60}C. {20, 21, 20, 22, 20, 24, 99}The mean of the set A is,
[tex]\overline{x}_A=\dfrac{25+24+ 25+ 22+ 21+23+ 1}{7}=20.143[/tex]
Similarly, the mean of set B and C is,
[tex]\overline{x}_B=\dfrac{20+ 23+ 25+ 21+ 24+ 22+ 60}{7}=27.857\\\overline{x}_C=\dfrac{20+21+ 20+ 22+ 20+ 24+ 99}{7}=32.286[/tex]
The standard deviation of the set A is,
[tex]\sigma_A = \sqrt {\dfrac{(25-20.143)^2+(24-20.143)^2......+(1-20.143)^2}{7}}\\\sigma_A = 7.936[/tex]
Similarly, the standard deviation of set B and C is,
[tex]\sigma_B = \sqrt {\dfrac{(20-27.857)^2+(23-27.857)^2......+(60-27.857)^2}{7}}= 13.217\\\sigma_C = \sqrt {\dfrac{(20-32.286)^2+(21-32.286)^2......+(99-32.286)^2}{7}}= 27.27[/tex]
The value of standard deviation of set C is the highest while set A is lowest.
Thus, the correct order which shows the standard deviations of the data sets A,B and C in order from greatest to least is C, B, A.
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Wilbur has homework assignments in seven subjects. He only has time to do five of them. How many ways are there for him to do five homework assignments?
Answer:
7
Use tables to confirm you answer'
kristin exercises 5 hours each week. Make a dot plot of her hours of exercise
and include the hours her friends exercise. Kristin and her friends' total hours
of exercise are shown in the table. How does Kristin's exercise time compare
with her friends
The dot plot is made by representing the frequency of the time spent exercising using dots
Kristin spends more time exercising than her friends
How to make the dot plot?The dataset is given as:
0 6 5 9 5 4 3 5 4 6 4 5 5 4 6
From the dataset, we have the following frequency table:
Time Frequency
0 1
3 1
4 4
5 5
6 3
9 1
See attachment for the dot plot made from the above frequency table
Interpreting the dot plotFrom the dot plot, we can see that Kristin's time of exercise is greater than all of her friend's time of exercise.
Hence, Kristin spends more time exercising than her friends
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100 POINTS WILL MARK BRAINLIEST NEED BY 9:00
Solve the linear equation below. Show ALL your work AND explain the type of solution you found!
8 - 2(4v + 6) = - 4 - 8v
Answer:
See below ~
Step-by-step explanation:
8 - 2(4v + 6) = -4 - 8v8 - 8v - 12 = -4 - 8v-8v - 4 = -4 - 8vOn placing any value for v, they will be equalIt has infinitely many solutionsAnswer:
Hello! The solution to this linear equation is 0 = 0. To find this solution:
Distribute -
8 - 2(4v+6) = -4 - 8v
8 - 8v - 12 = 14 - 8v
Subtract the numbers -
8 - 8v - 12 = -4 - 8v
-4 - 8v = -4 - 8v
Rearrange terms -
-4 - 8v = -4 - 8v
-8v - 4 = -4 - 8v
Rearrange terms -
-8v - 4 = -4 - 8v
-8v - 4 = -8v - 4
Add 4 to both sides -
-84v - 4 = -8v - 4
-8v - 4 + 4 = -8v - 4 + 4
Simplify -
-8v - 4 + 4 = -8v - 4 + 4
-8v = -8v - 4 + 4
-8v = -8v
Add 8v to both sides -
-8v = -8v
-8v + 8v = -8v + 8v
Combine like terms and simplify -
-8v + 8v = -8v + 8v
0 = -8v + 8v
0 = 0
The solution is 0 = 0. This is an identity: it is true for all values.
Hope this helps! Have a great day.
9-12 Use the properties of logarithms to expand the quantity.
11. [tex]\ln \frac{x^{2}}{y^{3} z^{4}}[/tex]
Step-by-step explanation:
lnx² - lny³ - lnz⁴
2lnx - 3lny -4lnz
3< 2x + 1 < 5 find x as an interval
Answer:
1<x<2
Step-by-step explanation:
1. Subtract 1 from everywhere ⇒ 2<2x<4
2. Divide by 2 everywhere ⇒ 1<x<2
Every twentieth customer at a coffee shop gets a $5 gift card. Design a simulation for estimating the probability that a customer would need to visit the coffee shop at least 5 times to win a gift card.
The simulation of the customer visit is an illustration of probability
The probability that a customer would visit the coffee shop at least 5 times to win a gift card is [tex](\frac {11}{12})^{n} - (\frac n{12}) * (\frac {11}{12})^{n - 1} - .......... - ^nC_4 * (\frac 1{12})^4 * (\frac {11}{12})^{n - 4}[/tex]
How to design the simulation?From the question, we understand that every 12th customer gets a $5 gift card.
This means that the probability that a customer gets a gift card is:
p = 1/12
The probability that a customer would visit the coffee shop at least 5 times to win a gift card is calculated using the following complement rule:
P(x ≥ 5) = 1 - P(x <5)
The equation becomes
P(x ≥ 5) = 1 - P(0) - P(1) - P(2) - P(3) - P(4)
Using the binomial formula
[tex]P(x) = ^nC_x * p^x * (1 - p)^{n - x}[/tex]
The equation becomes
[tex]P(x \ge 5) = ^nC_0 * (\frac 1{12})^0 * (1 - \frac 1{12})^{n - 0} - ^nC_1 * (\frac 1{12})^1 * (1 - \frac 1{12})^{n - 1} - .......... - ^nC_4 * (\frac 1{12})^4 * (1 - \frac 1{12})^{n - 4}[/tex]
Simplify
[tex]P(x \ge 5) = (\frac {11}{12})^{n} - (\frac n{12}) * (\frac {11}{12})^{n - 1} - .......... - ^nC_4 * (\frac 1{12})^4 * (\frac {11}{12})^{n - 4}[/tex]
Hence, the estimate that a customer would visit at least 5 times is [tex]P(x \ge 5) = (\frac {11}{12})^{n} - (\frac n{12}) * (\frac {11}{12})^{n - 1} - .......... - ^nC_4 * (\frac 1{12})^4 * (\frac {11}{12})^{n - 4}[/tex]
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The figure below illustrates the market for steel. If the steel market is competitive, firms can produce steel at a constant marginal cost of $100 per ton. Therefore, the price of steel is $100 per ton, and 100 tons are produced. Assume that if all the steel companies consolidate into a monopoly, the monopoly’s marginal cost will fall to $70 per ton. Use the straight line tool to draw the monopoly’s marginal revenue and marginal cost lines (extend the marginal cost line to 300 tons). Then use the plot point tool to plot the monopoly’s profit-maximizing price and output on the demand curve.
If the market is controlled by a monopoly, total surplus is $____
The monopoly price will be given as 110 dollars per unit. Then the total surplus will be 4800 dollars.
How do determine the monopoly price and the total surplus?The figure below illustrates the market for steel.
If the steel market is competitive, firms can produce steel at a constant marginal cost of $100 per ton.
Therefore, the price of steel is $100 per ton, and 100 tons are produced.
Assume that if all the steel companies consolidate into a monopoly, the monopoly’s marginal cost will fall to $70 per ton.
If the market is controlled by a monopoly, the total surplus will be
The demand curve has to be defined the demand curve will be
P = 150 - 0.5Q
Total revenue, TR = 150Q - 0.5Q^2
MR = 150 - Q
MC = $ 70
The monopolist will maximize profit at MR = MC
150 - Q = 70
=> Q = 80 units
Monopoly price, P = 150 - 0.5 × 80 = $ 110 / unit
Total surplus = (1/2)×(150-110)×80+(110-70)×80
= 1,600 + 3,200
= $ 4,800
The graph is given below.
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The following inequalities are equivalent
except ...
a) x<4
b) X-1<3
c) x + 1<4
d) x - 2<2
Answer:
c )
Step-by-step explanation:
To find equivalent inequalities, we are looking to isolate x on the left side.
a) x < 4 ✅
b) x -1 < 3 add 1 to both sides x -1 +1 < 3 +1 result x < 4 ✅
c) x + 1 < 4 subtract 1 from both sides x + 1 -1 < 4 -1 result x < 3 ❌
d) x - 2 < 2 add 2 to both sides x - 2 +2 < 2+2 result x < 4 ✅
just need help with solving for x
Answer:
13.83431104
Step-by-step explanation:
use sin (opposite/hypotenuse) and solve
How many solutions are there to the equation below?
x = -5
O A. 2
O B. 1
O c. o
D. 25
We will see that the equation has only one solution, so the correct option is B.
How many solutions an equation has?
For an equation of the form:
p(x) = C
Where p(x) is an expression that depends on x, and C is a constant.
The solutions are all the values of x that make the equality true.
For our case, we have:
x = -5
Notice that there is only one value of x that makes the equality true, if we replace x by -5 we get:
-5 = -5
So that is the only solution for the equation, then we conclude that the equation has only one solution, and the correct option is B.
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I WILL GIVE 20 POINTS TO THOSE WHO ANSWER THIS QUESTION RIGHT NOOOO SCAMS AND EXPLAIN WHY THAT IS THE ANSWER
Answer:
4
Step-by-step explanation:
You have to use Pythagorean Theory which states that a^2+b^2=c^2
It means that:
3^2+b^2=5^2
b^2=25-9
b = root of 16 (25-9=16)
b = 4
I hope that I helped :)
How many lines of symmetry does the picture have?
A. 3
B. 2
C. 1
D. 0
the answers is D cuz there is no line in the picture
You are helping some friends assemble a kite. They want to add a ribbon around the outside of the kite using the lengths indicated in the diagram. The lengths given in the diagram are in inches.
How many inches of ribbon do you need to go the entire way around the kite?
Answer in a complete sentence. Provide supporting work in your solution.
And
11y-22=7y-64y=16y=4So
7y-6=7(4)-6=28-6=225x=5(6)=30Perimeter:-
2(30)+2(22)2(30+22)2(52)104inAnswer:
104 inches
Step-by-step explanation:
A kite has two pairs of consecutive, congruent sides.
Therefore, BC = AB and AD = DC
We can use this to determine the values of x and y, and then the perimeter of the kite.
If BC = AB
⇒ 5x = 3x + 12
Subtract 3x from both sides:
⇒ 2x = 12
Divide both sides by 2
⇒ x = 6
If AD = DC
⇒ 11y - 22 = 7y - 6
Subtract 7y from both sides:
⇒ 4y - 22 = -6
Add 22 to both sides:
⇒ 4y = 16
Divide both sides by 4:
⇒ y = 4
As BC = AB and AD = DC
⇒ perimeter = 2 (BC + AD)
= 2 (5x + 11y - 22)
Substituting found values of x and y:
⇒ perimeter = 2 (5(6) + 11(4) - 22)
= 2 (30 + 44 - 22)
= 2 (52)
= 104 inches
8x+21+16x=25x+19 solve
Answer:
[tex]\Large\boxed{\sf{x=2}}[/tex]Step-by-step explanation:
GIVEN:
In order to solve this, you need to isolate the term x on one side of the equation.
8x+21+16x=25x+19First, combine like terms.
[tex]\Longrightarrow: \sf{8x+16x+21=25x+19}[/tex]
Solve.
8x+16x=24x
[tex]\Longrightarrow: \sf{24x+21=25x+19}[/tex]
You have to subtract by 21 from both sides.
[tex]\Longrightarrow: \sf{24x+21-21=25x+19-21}[/tex]
Solve.
[tex]\Longrightarrow: \sf{24x=25x-2}[/tex]
Subtract by 25x from both sides.
[tex]\Longrightarrow: \sf{24x-25x=25x-2-25x}[/tex]
Solve.
-x=-2
Then, you divide by -1 from both sides.
[tex]\Longrightarrow: \sf{\dfrac{-x}{-1}=\dfrac{-2}{-1}}[/tex]
Solve.
Divide the numbers from left to right.
[tex]\sf{\dfrac{-2}{-1}=2 }[/tex]
SOLUTIONS:
[tex]\Longrightarrow: \boxed{\sf{x=2}}[/tex]
Therefore, the correct answer is x=2.I hope this helps. Let me know if you have any questions.
Answer:
[tex]x = 2[/tex]
Step-by-step explanation:Given equation:
[tex]8x + 21 + 16x = 25x + 19[/tex]Combine like terms on the L.H.S and simplify the expression as needed.
⇒ [tex]8x + 21 + 16x = 25x + 19[/tex]⇒ [tex]x(8 + 16) + 21 = 25x + 19[/tex]⇒ [tex]x(24) + 21 = 25x + 19[/tex]⇒ [tex]24x + 21 = 25x + 19[/tex]Now, rewrite 25x in such a way such that 24x can be repeated on both sides. Clearly, we can rewrite 25x as 24x + x. Then,
⇒ [tex]24x + 21 = \underline{25x} + 19[/tex]⇒ [tex]24x + 21 = \underline{24x + x} + 19[/tex]Since 24x is being repeated on both sides, we can cancel it.
⇒ [tex]\bold{24x} + 21 = \bold{24x} + x + 19[/tex]⇒ [tex]21 = x + 19[/tex]Finally, subtract 19 on both sides to isolate x.
⇒ [tex]21 - 19 = x + 19 - 19[/tex]⇒ [tex]\boxed{2 = x}[/tex]Therefore, the value of x is 2.
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can you find the slope -intercept equation of each line code ?
Answer:
You can find and write the equations in Slope-Intercept form due to the slope and y-intercept.
Step-by-step explanation:
The Slope-Intercept Form Formula: y=mx+b
The m represents the slope while the b represents the y-intercept
You can also use y2 - y1 / x2 - x1 to find the slope which is the m in your formula.
Lastly, to find a y-intercept, you can plug in your coordinate for the x and y to do two-step linear equations.
Need answer ASAP! Please see screen shot.
Answer:
0.4 or [tex]\frac{2}{5}[/tex]
Step-by-step explanation:
James spun the arrow 30 times which means 30 is the total. In other words, it's your denominator ([tex]\frac{x}{30}[/tex]). It landed on the blue section 12 times which means 12 is the part of the whole. In other words, it's your numerator ([tex]\frac{12}{y}[/tex]). Plug in the entire fraction and you get [tex]\frac{12}{30}[/tex]. Divide 12 by 30 and you get 0.4 or if you divide both the numerator & denominator by 6, you get [tex]\frac{2}{5}[/tex]. Either one works, depending on what your question asks for.
O. Solve the equation using the Zero Product Property.
(2x-4)(2x-1) = 0
A. 2, - ;
B. 2, ;
C. -2, 2
D. -2, ;
The solution to the equation is x = 2 , x = 1/2
What is an Equation?Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.
It demonstrates the equality of the relationship between the expressions printed on the left and right sides.
Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.
Given data ,
Let the equation be represented as A
Now , the value of A is
Substituting the values in the equation , we get
( 2x - 4 ) ( 2x - 1 ) = 0
So , the two values of x are
when ( 2x - 4 ) = 0
Adding 4 on both sides , we get
2x = 4
Divide by 2 on both sides , we get
x = 2
And , when ( 2x - 1 ) = 0
Adding 1 on both sides , we get
2x = 1
Divide by 2 on both sides , we get
x = 1/2
Hence , the solution is x = 2 , 1/2
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What is the kinetic energy of a 50-kg child running to catch the school bus at 2 m/s
Answer:
100 J
Step-by-step explanation:
The formula for kinetic energy is as follows:
[tex]\boxed{KE= \frac{1}{2} mv²}[/tex]
where
KE= kinetic energy (J)
m= mass (kg)
v= velocity (m/s)
Given: m= 50 kg, v= 2 m/s
Substituting the given information into the formula:
KE
= ½(50)(2²)
= ½(50)(4)
= 100 J
A shape that has 4 sides and 4 angles.
Answer:
its called a Quadrilateral
Step-by-step explanation:
Answer:
Quadrilateral, parallelogram
BRAINLIEST please if this helped!cosec2a+cosec4a=cota-cot4a
Answer: Cosec 2 A + Cot 4 A = Cosec 4 A - Cot 2 A
Step-by-step explanation:
Taking LHS :
⇒Cosec 2 A + Cot 4 A
⇒Cosec 2 A + ( Cot 2 A )2
⇒Cosec 2 A + ( Cosec 2 A - 1 )2 ( we know : 1 + Cot 2 θ = Cosec 2 θ )
⇒Cosec 2 A + Cosec 4 A + 1 - 2 Cosec 2 A
⇒ Cosec 4 A + 1 - Cosec 2 A
⇒ Cosec 4 A + 1 - ( 1 + Cot 2 A)
⇒ Cosec 4 A + 1 - 1 - Cot 2 A
⇒ Cosec 4 A - Cot 2 A
or cosec2A+cosec4A=cotA-cot4A
The right triangle has legs a and b and hypotenuse c. If b=12 and c=13, then what does a equal?
Answer:
a = 5
Step-by-step explanation:
a^2 + b^2 = c^2
Substitute
b = 12
c = 13
a^2 + 12^2 = 13^2
a^2 + 144 = 169
a^2 = 25
a = [tex]\sqrt{25} \\[/tex]
a = 5
Mark brainliest please!
Answer:
use Pythagoras theorem
Step-by-step explanation:
[tex]a^{2} + b ^{2} = c ^{2} \\ a ^{2} + 12 ^{2} = 13 ^{2} \\ a = 5[/tex]
Tyrone biked 45 miles at an average speed of 18 miles per hour, without stopping. About how long did the ride take him? Use the formula T=d_r division on the d and r
O 2.25 hours
O 3 hours
2.5 hours
O 2.75 hours
Answer:
2.25 long of riding a bicycle
Answer:
2.25
Step-by-step explanation:
Find the circumference of the given circle with a diameter of 40 cm. Use 3.14 as an approximation of pi.
125.66
You can turn the diameter into radius by dividing it by 2, then multiply that by 3.14 and 2!
Hope I could help.
C=2pie(r)
Allen finds the area of the woods to be approximately 9,680
square feet. Why is Allen incorrect?
A
Allen is incorrect because he applied the scale to the
sides and then found the total area of the woods.
B
Allen is incorrect because he found the total area of the
woods and then applied the scale.
Allen is incorrect because he did not apply the scale.
D
Allen is incorrect because he used the formula to find hm
perimeter instead of area.
is it c
(what is the scale)
Takeru has 4 bird feeders. It takes 4/3 bags of bird seeds to fill each feeder. what is the minimum number of bags Takeru needs to fill all the feeders?
Answer: 6
Step-by-step explanation: You would divide 4 by 3 and divide your answer by 2.