An Olympic-sized pool, which holds 660,000 gallons of water, is only 63% full. The pool maintenance company adds more water, filling the pool to 90% full. How many gallons of water did they add?

The amount of water added by the pool maintenance to make the pool 90% full is 178,200 gallons.

Step-by-step explanation:

The amount of water an Olympic-sized pool can hold is, 660,000 gallons.

The pool is 63% full at the moment.

The of water in the pool now is:

If the pool is 90% full then the amount of water in the pool is:

The amount of water added by the pool maintenance is:

Amount of water added = 90% of 660,000 - 63% of 660,000

Thus, the amount of water added by the pool maintenance to make the pool 90% full is 178,200 gallons.

did you get the answer yet?

step-by-step explanation:

b. y = 4x - 2

step-by-step explanation:

to find a parallel equation to an equation, make sure both equations have the same slope but different y-intercepts.

y = 4x + 1

4 = slope

1 = y-intercept

y = 4x - 2

4 = slope

-2 = y-intercept

they both have the same slope but different y-intercepts, so, b. is the correct answer.

and to check your work, you can graph both equations. : )