Word Problem Help

Question

A residential water bill is based on a flat fee of $10 plus a charge of .75 for each 1000 gallon of water used. Find the number of gallons of water a family can use and have a monthly water bill that is less than $55.

Answer 1

Water bill equals $10 plus $0.75 per 1000 gallons used.

 

x = number of 1000 gallons used

 

$10 + $0.75x = $55

$0.75x = $45

x = 60

 

So they can use less than 60 * 1000 = 60,000 gallons per month