D = -38t + 220

Rachel is driving a race car at a constant speed on a closed course. The formula shown above describes the remaining distance, D, measured in meters, that Rachel has to travel after t seconds. What is Rachel's speed in meters per second? ​

Answer:

D = 90°

E = 147°

F = 33°

Step-by-step explanation:

E:

E is 147°, because it is vertical to the angle 147°

F:

F is 33°, because 147* is its supplementary angle, or angles that add up to 180°

D:

D is worth 90°, because its supplement is worth 90°

-Chetan K

The area and the amount of gravel are illustrations of proportions.

7 lb will cover an area of 1 square foot, while 315 lb will cover an area of 45 square feet.

The given parameters are:

[tex]252\ lb= 36ft^2[/tex]

The number of pound for an area of 1 square foot is calculated as follows:

[tex]x = 1ft^2[/tex]

So, we have:

[tex]x = 1ft^2[/tex]

[tex]252\ lb= 36ft^2[/tex]

Cross multiply

[tex]x \times 36 = 252 \times 1[/tex]

Divide both sides by 36

[tex]x = 7lb[/tex]

The area to be covered with 315lb gravel is calculated as follows:

[tex]315lb = y[/tex]

So, we have:

[tex]315lb = y[/tex]

[tex]252\ lb= 36ft^2[/tex]

Cross multiply

[tex]y \times 252 = 36 \times 315[/tex]

[tex]y \times 252 = 11340[/tex]

Divide both sides by 252

[tex]y = 45[/tex]

Hence, 7 lb will cover an area of 1 square foot, while 315 lb will cover an area of 45 square feet.

Read more about proportions at:

https://brainly.com/question/13114933

Answer:

Here is a pic

Step-by-step explanation:

cause i got it right on IM

Answer:

[tex]6+\frac{7!}{5!-8}[/tex]

Step-by-step explanation:

The only way to get this is by using advanced operations such as Factorials.

Answer:

X= y-y1/m+x1

Step-by-step explanation:

there again

Answer:

$1.89

Step-by-step explanation:

Given Equation:

5b=9.45

What are we looking for?

b

We must solve by making b by itself:

5b=9.45

÷5      ÷5

b = 9.45/5

b = 1.89

Therefore, each box of cereal costs $1.89

Hope this helps!

Answer:

The answer is letter B

Step-by-step explanation:

-5x^2+3x+10

-25x+3x(-5)+10

-25x-15+10

-40+10

30

9514 1404 393

Answer:

  A.  f(x) = x^2 -3x -10

Step-by-step explanation:

You can easily determine the correct equation by looking at a couple of table values.

The y-value for x=0 is -10, which is the constant in the quadratic formula. (eliminates choices B and C)

The y-value for x=1 is -12, which is the sum of coefficients in the quadratic formula. For choice A, the sum of coefficients is 1 -3 -10 = -12. For choice D, the sum of coefficients is 1 +3 -10 = -6. The value for choice D does not match the table, but the value for choice A does.

The function that represents the table is ...

  f(x) = x^2 -3x -10

_____

Additional comments

If you don't have equations to test, and you want to write your own equation, there are a couple of ways to do that. One is to look at the differences of y-values, and the differences of those.

The sequence of y-values shown is ...

  30, 18, 8, 0, -6, -10, -12

The sequence of differences of these numbers, starting with 18-30 = -12 is ...

  -12, -10, -8, -6, -4, -2

The sequence of differences of these numbers is ...

  2, 2, 2, 2, 2

The fact that they are constant tells you a quadratic (degree = 2) will describe the table.

We can find the coefficients a, b, c in the quadratic formula f(x) = ax^2 +bx +c as follows. First, we define d1 as the first of the sequence of differences (-12), and d2 as the value of the second differences (2). And we'll let x0 and y0 be defined as the first of the x-values (-5) and y-values (30).

The formulas for the coefficients (a, b, c) can be found from ...

  a = (d2)/2 = 2/2 = 1

  b = (d1) -a(2·(x0) +1) = -12 -1(2·(-5) +1) = -12 +9 = -3

  c = y0 -x0(a·x0 +b) = 30 -(-5)(1·(-5) +(-3) = 30 -40 = -10

As we noted above, the y-value corresponding to x=0 is also this c value. When the table includes x=0 and x=1, those can be used to simplify the finding of the formula coefficients.

These computations tell us f(x) = x^2 -3x -10, as above.

__

If you have to do this again, it might be useful to make a note of the expressions for 'a', 'b', and 'c' that we showed here, along with the definitions of the variables we used in them.

__

Another way to find the formula for f(x) is to make use of a calculator or spreadsheet capable of quadratic regression. Give it three (x, y) pairs from the table, and it can tell you the formula coefficients. This is illustrated by the attachment.

Answer:

36x - 108 kilometers²

Step-by-step explanation:

Area = length x width

36 ( x - 3 ) =

36x - 108

-Chetan K

Answer:

answer see below

Step-by-step explanation:

Draw four straight lines that are perpendicular to each other and use a compass to cut AB's length on each line to form a square.

Answer:

$927.12

Step-by-step explanation:

18.94×50 =$947 15%× 18.94=2.84 2.84×7 =19.88 947-19.88=927.12

Answer:

199.5lbs,  199.6lbs, 199.7lbs, 199.8lbs, 199.9lbs

You can choose any of the 5

1/4 + 2/3

= 3/12 + 8/12

=11/12

1–11/12

you have 1/12 left

Answer:

one-quarter left

Step-by-step explanation

pretty sure this is the answer, but i could be wrong

Answer:

[tex]omitt \: x + 3 \\ \\ you \: have \\ \frac{x - 2}{x + 2} \\ \\ goid \: luck \\ \: and \: dont \: beg \: any \: one \: only \: study \: more[/tex]

Answer:

First we will find the surface area of the right triangle.

area of the right triangle=1/2*base*height.

now multiply it by 2 then we will get the S.A of both the right triangles.

Now, the other seems to be a rectangle,so find its area. And also the unseen side is a rectangle so find its area also .

And. now at the last. plus. the area of all the sides. you will get your answer. understand buddy.

Answer:

Car A was 20 miles east of car B.

Step-by-step explanation:

just did it:)

Answer:

|J| = - 40

Step-by-step explanation:

(-2)(8) - (6)(4)

-16 - 24

= - 40

Answer:

-0.45

Step-by-step explanation:

oof

Relative to Stacy's goal, her average aerobics time over the last five weeks will be 0.09.

It is the average amount by which the function varied per unit throughout that time period. It is calculated using the gradient of the line linking the interval's ends on the graph depicting the function.

Stacy likes to do heart-stimulating exercises 10 hours every week to remain in shape. She tracks how much time she does heart-stimulating exercise every week compared with her goal. The table shows the information throughout the previous five weeks.

The table is given below.

Week                                          1              2            3              4            5

Aerobics time (hours)              2.8          −2           1 ³/₄          0           −3

Then relative to Stacy's goal, her average aerobics time over the last five weeks will be given as

⇒ (2.8 − 2 + 1 ³/₄ + 0 − 3) / 5

⇒ (0.45) / 5

⇒ 0.09

Relative to Stacy's goal, her average aerobics time over the last five weeks will be 0.09.

More about the average rate change link is given below.

https://brainly.com/question/28744270

#SPJ5

Answer:

hs kgo s 7th duk6xutf2 ki kwai uh dragnet hi 2hn kd7uhsjsmsjsuuejejejjeejje

Step-by-step explanation:

hopes this helps hu dujdtrdd72 heckle Chiang Huskies heavier kir https://vm.tiktok.com/ZM8fbk1KS/ackrabbits granite Kazmirhttps://vm.tiktok.com/ZM8fbk1KS/

Answer:

is there a image?

Step-by-step explanation:

Answer:

what

Step-by-step explanation:

Answer:

12

Step-by-step explanation:

x=4

2×4+4

=12

I think this is the answer

Answer:

slope of AB = Y2 -Y1/X2 -X1

=7 - 3/-5-(-5)

=4/-5 +5 = 4/0

= undefined ( a number divided by 0 is undefined)

slope of CD =9 -9/-10-1

= 0/-11

= 0

since AB is not equal to CD

THE LINES ARE PERPENDICULAR

Answer:

2+2=4

Step-by-step explanation:

if you put up 2 fingers and then add 2 more (2+2) you will get 4!

lol I hope that helped!

The answer is 1, 2, 5, and 9

Answer:

The last one

Step-by-step explanation:

Because it tells you what y is

Answer:

Assuming its asking which is the easiest one to use substitution its the last one: y= 2x : x + y = 28

Step-by-step explanation:

Because y and x are already one opposite sides you can substitute y in the 2nd equation with 2x. So you'll get 3x = 28 so x = 9.333333334. Then you plug your answer for x in the original equation to get y = 18.666666667

28x⁴y³z  = 4x³y³z (7x)

12x³y⁴z² = 4x³y³z (3yz)

Answer:

The answer is x = -1. Hope this could help

Answer:

1739999200

Step-by-step explanation:

I am sorry, but I am simply not putting the explanation for that...