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2 years ago

14

The lengths (in miles) of two highways after t years of construction can be modeled by 20t + 150 and 15t+ 200. What is the diffe

rence of the lengths of the highways when 1 = 1 = 4? Explain.

1 answer:

Mashutka [201]2 years ago

3 0

Step-by-step explanation:

13.5 is the difference of the length of the roads

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11. The regression equation y=2x + 8 represents how many minutes a sound will last after applying x pounds of pressure to the sy

Sidana [21]

Then y=2(4)+8
=8+8
=16

8 0

3 years ago

A rectagular, above ground pool is 18 feet long, 9 feet wide, and 54 inches deep. One cubic foot of water weighs about 62.4 poun

ollegr [7]

Answer:

45,489.6 pounds!

Step-by-step explanation:

To solve this problem, first we need to find the volume of the pool.

We know that the dimensions of the pool are:

Width = 9ft

Length = 18ft

Height = 54in = 4.5 ft

So the volume of the pool is:

Volume = Width x Length x Height = 9ftx18ftx4.5ft = 729ft^3

We know that one cubic foot of water weights about 62.4 pounds. To fill the pool, we will need 729ft^3 of water.

So the weight of the water is:

Weight = 729ft^3 x 62.4 pounds/ft = 45,489.6 pounds!

4 0

2 years ago

What is the equivalent of 2/5^3

Lena [83]

$\frac{8}{125 }$

6 0

3 years ago

Read 2 more answers

Geometric Sequence:1/2,1/3,2/9,4/27,8/? I don't know the bottom number but the top number is 8☹️

Aleks [24]

Hello,

In this geometric sequence, the ratio is (1/3)/(1/2)=(1*2)/(3*1)=2/3

1/2*2/3=2/6=1/3
1/3*2/3=2/9
2/9*2/3=4/27
4/27*2/3=8/81

8 0

2 years ago

Given the function f(x)=x2+3x-2

defon

Answer:

11

Step-by-step explanation:

The average rate of change of function f on interval [a, b] is ...

m = (f(b) -f(a))/(b -a)

Here, that is ...

m = (f(6) -f(2))/(6 -2)

So, we need to evaluate the function at x=6 and x=2. Writing it in "Horner form" makes this easier.

f(x) = (x +3)x -2

f(6) = (6 +3)6 -2 = 54 -2 = 52

f(2) = (2 +3)2 -2 = 10 -2 = 8

Then the slope is ...

m = (52 -8)/4 = 13 -2 = 11

The average rate of change of f(x) from 2 to 6 is 11.

5 0

3 years ago