Determine the unit rate for the following problems : he pumped 54 gallons in 12 minutes

To find the unit rate, we are essentially going to reduce this ratio down to it's lowest possible terms. So in this case, we are going to find how many gallons are pumped every 1 minute.

To do this, we are going to divide 54 by 12:

So now that we have this in such terms, we can call it a unit rate. Therefore, the unit rate is 4.5 gallons/min.

it would take 7/10 of an hour too fill the pool.

step-by-step explanation:

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9