Work out the value of each expressions.


a) 5(x³ - x) + 5x² /3 - 12x when x=3


b) 3y+16+ (y/2) -20/y when y=4

Answer:

See below

Step-by-step explanation:

xpand R sid to get

5r+1  = am + ar        subtract 'ar' from both sides

5r - ar    +  1   = am    factor out 'a'

r ( 5-a)  + 1 = am

r (5-a) = am-1          divide both sides by  ' 5-a'

r = (am-1 ) / (5-a)

Answer: 20 years

Step-by-step explanation:

Let M be the sum of money invested.

Given Sum of money doubles itself in 10 years.

Then, M will become 2M in 10 years.

Now we can calculate interest for ten years as given below.

From the above calculation, M is the interest for the first 10 years.

In simple interest, interest earned will be the same every year.

So, interest earned in the next 10 years also will be M.

So it will take 20 years.

Thank you if you can give me a brainliest.

Answer:

goooooood luccckkkk.....

From the intercepts of the given graph, we have that:

Morgan’s house is located 35 miles from Robin's house, and it took Robin 40 minutes to drive that distance.

For this problem, the axis are given as follows:

The intercepts are given as follows:

y = 35, x = 40.

Hence:

Morgan’s house is located 35 miles from Robin's house, and it took Robin 40 minutes to drive that distance.

More can be learned about the intercepts of a function at https://brainly.com/question/24212383

#SPJ1

Answer: Height = 5m

Step-by-step explanation: To solve the height of the triangle we can use the Area formula and substitute the values given to solve for heigh.

A = ( b * h ) / 2

17.5 = (7 * h) / 2

17.5 (*2) = 7 * h

(Remember that everything done to one side has to be done to both. We can multiply by 2 on both sides to eliminate the 2.)

35 = 7 * h

35/7 = h

5 = h

The height of the triangle equals 5.

Answer:

second is obtuse angle .

Step-by-step explanation:

5. 160°

6. 120°

[im not sure what they're asking for but if its degree then this is the answer]

Answer:

2(x+y)=98 is the answer.

The product, in scientific notation, can be rewritten as:

3.4196*10²⁵

We want to find the product between the two numbers:

(4.12*10⁹)*(8.3*10¹⁵)

To take it, we can rewrite the product as:

(4.12*8.3)*(10⁹*10¹⁵)

(34.196)*(10⁹⁺¹⁵)

(34.196)*10²⁴

Now, to get this in scientific notation, we need to have only one digit in the left side of the decimal point, then we can rewrite:

(34.196)*10²⁴ = 3.4196*10²⁵

If you want to learn more about scientific notation:

https://brainly.com/question/5756316

#SPJ1

Possible ways there are for at least one of the spinners to land on the pink is 2 / 3.

Given spinner A has pink, black, and blue sections.

The number of possible outcomes of spinner A to land not on pink is 2/3

Given spinner B has pink and black sections.

So, the number of possible outcomes of spinner B to land not on pink is 1/2

Annabelle spins each spinner once

possible ways not land on pink = 2/3 * 1/2 = 1/3

Possible ways there are for at least one of the spinners to land on the pink is  

= 1 - possible ways not to land on the pink

= 1 - 1/3

= 2 / 3

Possible ways there are for at least one of the spinners to land on the pink is 2 / 3.

To learn more about possible outcomes topic refer below

https://brainly.com/question/19567251

#SPJ9

a) The meaning of the point (t, s) = (5, 6) is that the backpacker travels a distance of 5 miles in 6 hours.

b) The equation of the relationship between the distance traveled by the backpacker and time taken is equal to s = (6 / 5) · t.

According to the image attached aside, we find that the distance traveled by the backpacker (s), in miles, is directly proportional to the time taken (t), in hours. In other words, we have the following relationship:

s ∝ t

s = k · t      (1)

Where k is the constant of proportionality, in miles per hour.

a) The meaning of the point (t, s) = (5, 6) is that the backpacker travels a distance of 5 miles in 6 hours.

b) To determine the equation of the relationship, we need to calculate the constant of proportionality. If we know that t = 5 h and s = 6 mi, then the equation of the relationship is:

6 = 5 · k

k = 6 / 5

s = (6 / 5) · t

The equation of the relationship between the distance traveled by the backpacker and time taken is equal to s = (6 / 5) · t.

To learn more on linear relationships: https://brainly.com/question/10713055

#SPJ1

Answer:

2/3

Step-by-step explanation:

Compute the slope of the line through the following points:

p_1 = (1, -1) and p_2 = (-8, -7)

The slope of the line through (x_1, y_1) and (x_2, y_2) is:

(y_2 - y_1)/(x_2 - x_1)

Substitute (x_1, y_1) = (1, -1) and (x_2, y_2) = (-8, -7):

= (-7 - -1)/(-8 - 1)

-8 - 1 = -(8 + 1):

= (-7 - -1)/(-(8 + 1))

8 + 1 = 9:

= (-7 - -1)/(-9)

(-1)^2 = 1:

= (-7 + 1)/(-9)

-7 + 1 = -6:

= (-6)/(-9)

The gcd of -6 and -9 is -3, so (-6)/(-9) = (-3×2)/(-3×3) = (-3)/(-3)×2/3 = 2/3:

Answer: = 2/3

By using Pythagorean theorem, the shortest distance between planet Q and planet R is 1.25 × 10⁷ kilometers (12.5 million kilometers).

The picture shows the geometry between three planets, which represents the three vertices of a right triangle, the straight line distance between the points Q and R represents the hypotenuse of the right triangle. The hypotenuse can be found by using the Pythagorean theorem:

QR = √(PQ² + PR²)

Where QR is the hypotenuse of the right triangle, in kilometers.

If we know that PQ = 3.5 × 10⁶ km and PR = 1.2 × 10⁷ km, then the distance between planet Q and planet R is:

QR = √[(3.5 × 10⁶ km)² + (1.2 × 10⁷ km)²]

QR = 1.25 × 10⁷ km

The shortest distance between planet Q and planet R is 1.25 × 10⁷ kilometers (12.5 million kilometers).

To learn more on Pythagorean theorem: https://brainly.com/question/14930619

#SPJ1

Answer:

Randall and the most money. she earned 50 cents more than Stephano did.

Step-by-step explanation:

so it's Randall makes $27.50 on his first day and $25 on a second date and and 32.50 on his third day you would add those up to get $85 in all. now Stefano gets 7.50 22.50 12.50 15.00 and 17.00 dollars , and when you add all those together he gets 84.50 and all. meaning that random made more money by .50 cents.

The margin of error is multiplied by √2.

Given that All else is equal if you cut the sample size in half and to make a statistical inference about the mean of the normally distributed population from which it was drawn ME=(z+s)/√n.

Margin of error (ME) from the mean can be calculated using the formula ME=(z+s)/√n where

z means it is the corresponding statistic of the given confidence level

s means it is the standard deviation of the sample (or of the population if it is known)

N is the sample size

As we know margin of error is proportional with inverse of √N,

If we will cut the sample size in half, the margin of error is multiplied by √2.

Hence, if sample size is cut in half then the margin of error when using the sample to make statistical inferences about the mean of the normally distributed population from which it was drawn is √2.

Learn more about the margin of error from here brainly.com/question/8520351

#SPJ9

Answer:

Remove the negative from the 1 on the first increasing interval

The linear equation for the moose population p as a function of t the years since 1986 is P(t) = 380t + 2920.

The equations with two variables where each variable has the largest exponent order of 1 having one, zero, or an infinite number of solutions, and are referred to as linear equations in two variables. A linear equation with two variables has the conventional form ax + by + c = 0, where x and y are the variables. Additionally, the answers can be expressed as ordered pairs, like (x, y).

Linear equations have three main forms which are as follows:

We will consider x on the graph to be years since 1986 and y on the graph to be the number of Moose.

We have two points on the graph:  (6, 5200) and (11, 7100)

Using the slope formula m = (y2 - y1)/(x2 - x1), we can find the slope of this line:

m = (y2 - y1)/(x2 - x1)                

m = (7100 - 5200)/(11 - 6)          

m =  1900/5                            

m = 380                                  

Now, that we have the slope of the line, we can use the point-slope formula (y - y1) = m(x - x1) to find the equation for the line.  Here, we're using the first point, but either point will produce the same answer.

(y - y1) = m(x - x1)                                    

y - 5200 = 380(x - 6)                            

y - 5200 = 380x - 2280                            

y - 5200 + 5200 = 380x - 2280 + 5200    

y = 380x + 2920                                    

Since the equation that is being sought is supposed to be in terms of P and t, We will replace y with P and x with t.

Hence, the equation will be P(t) = 380t + 2920.

To learn more about linear equations, visit:

https://brainly.com/question/13738061

#SPJ4

13) Vertex = (1, -5)

y - intercept = -6

x - intercept is non - existent

The parabola opens downward.

13) We are given the parabolic function;

y = -x² + 2x - 6

x of vertex = x of axis of symmetry: x = -b/2a = -2/(2 * -1) = 1

y of vertex; y = f(1) = -(1)² + 2(1) - 6 = -5

Vertex = (1, -5)

y - intercept = -6

x - intercept is at y = 0 and as such are; (1 + √-5) and (1 - √-5)

Since a < 0, the parabola opens downward.

14) We are given the parabolic function;

y = -3(x - 2)² + 12

y = -3(x² - 4x + 4) + 12

y = -3x² + 12x - 12 + 12

y = -3x² + 12x

x of vertex = x of axis of symmetry: x = -b/2a = -12/(2 * -3) = 2

y of vertex; y = f(2) = -3(2)² + 12(2) = 12

Vertex = (2, 12)

y - intercept = 0

x - intercept is at y = 0 which is x = 4

Since a < 0, the parabola opens downward.

Read more about Parabola function curves at; https://brainly.com/question/16536783

#SPJ1

According to the given statement  8.4E9 can be written in scientific notation as 8.4 × 10⁹

Numbers that are either too large or too little to be conveniently stated in decimal form can be expressed using scientific notation.

If a number between 1 and 10 is multiplied by a power of 10, the result is written in scientific notation.

The major benefit of scientific notation is that it enables us to scale down extremely large or extremely small numbers into sizes that are much easier to handle. These numbers are much simpler to work with when they are written in scientific notation.

To know more about Scientific Notation  visit :

https://brainly.com/question/16936662

#SPJ4

Answer:

Ok, since this is not a multiple choice question, I'll tell you how I would write it.

Step-by-step explanation:

It stopped snowing for 10 to 12 hours after the storm and then started snowing again. This is because you can see that the y value (amount of snow on the ground in inches) has no change between 10 to 12 hours after the storm began.

For the second part, Think of the independent variable as the cause(its value is independent of other variables) and the dependent variable as the effect, essentially the value that depends on changes in the independent variable. In this case it tells you that the perimeter of a square depends on the length, so that means that the length is independent and the perimeter of the square is dependent. So, the dependent variable is the perimeter, because the perimeter of a square depends on the length.

A function relating these variables is K(x) = y since the dependent variable (y) depends on the independent variable (x)

Now for the last part that says So K(5) = ___ meaning if 5 ___ I don't really understand what it is asking for, since K(x) = y then K(5) would equal whatever y is when x is 5, but k(5) could also equal 5k if we were just evaluating.

The probability that a five-card hand will contain a straight = 5/1274

There are 52 cards in a deck from which each 13 cards are from 4 different suits (clubs, diamonds, spades and hearts) in a game of poker.

Each 13 cards from high to low are Ace, 2, 3, 4, 5, 6, 7, 8, 9, 10, Jack, Queen, King. So a straight of five cards, i.e., five cards in unbroken numerical sequence would be got only from 10 cards in a sequence.

So the possible ways to get a single straight five from all four suits = [tex]4^5[/tex]

Now as we doesn't need all 5 cards from a single suit, we can ignore 4 ways from the above number. i.e.,  [tex]4^5-4 = 1020[/tex] ways.

Hence the possible ways to get a straight five from 10 cards from all four suits = 10 x 1020 = 10200 ways

Total number of ways to select 5 cards from 52 cards = 52C5

Thus,

The probability that a five-card hand will contain a straight = 10200 / 52C5

                                                                                                  = 5/1274                        Learn more about probability at https://brainly.com/question/5858025

#SPJ4

Answer:

Step-by-step explanation:

Comment

2 angles are complementary means together they = 90 Degrees.

Let the smaller angle be x

The complement = 3*x - 14  It is the larger angle.

Givens

<1 = x

<2 = 3x - 14

<1 + <2 = 90

Solution

x + 3x -14 = 90              Combine the left

4x - 14 = 90                  Add 14 to both sides

4x - 14+14 = 90 + 14     Combine

4x = 104                       Divide both sides by 4

4x/4 = 104/4

x = 26

Answer

<1 = 26

<2 = 3*26 - 14

<2 = 78 - 14

<2 = 64

Answer:

.549 (all under bar/repeted)

Step-by-step explanation:

This rule apply to triangles in spherical geometry If there another value that they would always sum to greater than 180 degrees.

Euclidean geometry is the study of geometrical shapes (plane and solid) and figures based on different axioms and theorems.

In spherical geometry, angles are defined between great circles, resulting in a spherical trigonometry that differs from ordinary trigonometry in many respects; for example, the sum of the interior angles of a spherical triangle exceeds 180 degrees.

Thus, this rule apply to triangles in spherical geometry If there another value that they would always sum to greater than 180 degrees.

To learn more about Euclidean Geometry :

brainly.com/question/2251564

#SPJ1

An expression is a combination of terms that are combined by using mathematical operations such as subtraction, addition, multiplication, and division.

The numbers are 15 and 7.

An expression is a combination of terms that are combined by using mathematical operations such as subtraction, addition, multiplication, and division.

We have,

Let the two numbers be M and N.

The difference between the two numbers is 8.

i.e M - N = 8

M = 8 + N ____(1)

When twice the first number is added to three times the second number, the result is 51.

Let the first number = M

i.e 2M  + 3N = 51 _____(2)

Now,

2 ( 8 + N )  + 3N = 51

16 + 2N + 3N = 51

5N = 51 - 16

5N = 35

N = 7 put in (1)

M = 8 + 7 = 15

Thus the numbers are 15 and 7.

Learn more about expressions here:

https://brainly.com/question/28279284

#SPJ1

Answer:

EQ = 47

Step-by-step explanation:

Since Q is midpoint, EQ = QF

or EQ = EF/2

5x + 2 = (9x + 13)/2

10x + 4 = 9x + 13

10x - 9x = 13 - 4

x = 9

EQ = 5x + 2 = 5(9) + 2 = 45 + 2 = 47

Answer:

-4-9=-13

Step-by-step explanation:

The value of j from the equation h-10/j=k is equal to 10/(h-k).

Given that the equation is h-10/j=k.

We are required to find the value of j from the given equation.

Equation is a relationship between two or more variables that are expressed in equal to form. It may be a linear equation,quadratic equation, cubic equation and many more depending on the power of the variables present in that equation.

The equation is h-10/j=k.

-10/j=k-h

1/j=(k-h)/-10

j=-10/(k-h)

j=10/(h-k)  

(We can eliminate the negative sign by taking negative out from the denominator.)

Hence the value of j from the equation h-10/j=k is equal to 10/(h-k).

Learn more about equation at https://brainly.com/question/2972832

#SPJ9

It depend on the repeating part.

If x = 0.393939… (the repeating part is underlined), then 100x = 39.393939…, and

100x - x = 39.393939… - 0.393939…

99x = 39

x = 39/99 = 13/33

On the other hand, if you mean x = 0.3999…, then 10x = 3.999… and 100x = 39.999…, so that

100x - 10x = 39.999… - 3.999…

90x = 36

x = 36/90 = 2/5