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3 years ago

I WILL GIVE BRAINLIEST AND POINTS PLEASE I NEED TO PASS !!!!!!

Mathematics

1 answer:

WITCHER [35]3 years ago

7 0

The answer is D, 14...

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You are saving for a new laptop that cost $499. You work two jobs: cleaning your grandparents' house for $15 an hour and mowing

xxMikexx [17]

Answer:

15x + 10x less than it equal to 499

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

What was Mike's average rate of descent over his last three hours?

Romashka [77]

Answer:

<em>The average rate of descent over the last 3 hours is 1000 ft/h. </em>

Step-by-step explanation:

<u>Rate of Change</u>

It's usually referred to as to the variation that one magnitude has in reference to another. The reference magnitude can be time t. The rate of change is calculated as the slope of the curve that represents the function.

The image shows the variation of Mike's height above sea level in feet with time in hours. We need to calculate the rate of change in the last three hours (from 7 to 10).

The rate of change can be calculated with the slope of the line, which formula is:

$\displaystyle m=\frac{h_2-h_1}{t_2-t_1}$

Let's pick two points (7,4000) (10,1000):

$\displaystyle m=\frac{1000-4000}{10-7}=\frac{-3000}{3}=-1000$

$m=-1000\ ft/h$

Note the rate of change is negative, which means the height is decreasing.

The average rate of descent over the last 3 hours is 1000 ft/h.

8 0

3 years ago

In a prize drawing at a fundraiser, you choose three different numbers from 1 to 8. How many ways are there to choose three numb

Sergeu [11.5K]

For the first number you can choose from 8, for the second number only 7, for the third number only 6. So the number of combinations is 8x7x6=336

8 0

3 years ago

Find the area of the circle if the square has an area of 900 in2. Give your answer in terms of pi

shusha [124]

There is no attached picture, but I guess it is like the one I attached.
If so, the first thing is finding the side measure:
$A_{square}=l^2 \\ l= \sqrt{A} = \sqrt{900} \;\;\Rightarrow l=30\;in$
Now, radius is half this measure: 15 in.
And circle area is:
$A_{circle}=\pi r^2=\pi\cdot(15)^2\:\;\Rightarrow A_{circle}=225\pi\;in^2$

8 0

3 years ago

Write the following linear equations into the standard form Ax+ by=c

Brrunno [24]

Answer:

Step-by-step explanation:

1). 7x - 2y = 5 , A = 7 , B = 2 , C = 5

2). 4x - y = 1 , A = 4 , B = - 1 , C = 1

3). 5x - 2y = 3 , A = 5 , B = - 2 , C = 3

4). 4x - 3y = 3 , A = 4 , B = - 3 , C = 3

5). 2x + y = 15 , A = 2 , B = 1 , C = 15

4 0

2 years ago