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3 years ago

A)

Mathematics

1 answer:

andre [41]3 years ago

6 0

Answer:

C The car accelerated for 6 seconds and continued at a constant speed

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Craig ran the first part of a race with an average speed of 8 miles per hour and biked the second part of a race with an average

stira [4]

To answer we let x be the distance he covered in the first part of the trip and y be the distance in the second part of the trip. The time it took him to finish the first trip is x/8 and the second y/20. The equations that best represent the given scenario is,
x + y = 15
x/8 + y/20 = 1.125
The values of x and y are 5 and 10, respectively.

4 0

4 years ago

Read 2 more answers

Simplify <br>7x+[x-(5+x)]<br><br>a) 7x-5<br>b)8x-5<br>c)9x-5

Aleksandr [31]

Answer:

It would be a which is 7x-5

6 0

3 years ago

What is the max height of n=-1t^2+2t+8

zepelin [54]

The maximum height of the function is 9

<h3>How to determine the maximum height?</h3>

The equation of the function is given as:

n=-1t^2 + 2t + 8

Differentiate the function

n' = -2t + 2

Set to 0

-2t + 2 = 0

Subtract 2 from both sides

-2t = -2

Divide both sides by -2

t = 1

Substitute t = 1 in n=-1t^2 + 2t + 8

n=-1(1)^2 + 2(1) + 8

Evaluate

n=9

Hence, the maximum height of the function is 9

Read more about maximum values at:

brainly.com/question/10373132

#SPJ1

7 0

3 years ago

Assume that the sales of a certain appliance dealer can be approximaed y sraig were $6000 in 1982 and $ 64,000 in 1987. Let x -

viktelen [127]

Answer:

$y=11,600x+6,000$

Yearly sales in 1990: $98,800.

Step-by-step explanation:

We have been given that the sales of a certain appliance dealer can be approximated by a straight line. Sales were $6000 in 1982 and $ 64,000 in 1987.

If at 1982, $x=0$ then at 1987 x will be 5.

Now, we have two points (0,6000) and (5,64000).

$\text{Slope}=\frac{64,000-6,000}{5-0}$

$\text{Slope}=\frac{58,000}{5}$

$\text{Slope}=11,600$

Now, we will represent this information in slope-intercept form of equation.

$y=mx+b$ , where,

m = Slope,

b = Initial value or y-intercept.

We have been given that at $x=0$ , the value of y is 6,000, so it will be y-intercept.

Substitute values:

$y=11,600x+6,000$

Therefore, the equation $S=11,600x+6,000$ represents yearly sales.

Now, we will find difference between 1990 and 1982.

$1990-1982=8$

To find yearly sales in 1990, we will substitute $x=8$ in the equation.

$S=11,600(8)+6,000$

$S=92,800+6,000$

$S=98,800$

Therefore, the yearly sales in 1990 would be $98,800.

6 0

3 years ago

What is the area of the figure use 3.14 for pi

Stolb23 [73]

For the circle we can just do 7.5^2*3.14=176.625 because if you put the 2 semi circle you get a whole circle.
and if the diameter is 15 then the width of the rectangle is 15 so 28*15=420+176.625=596.625

4 0

3 years ago