Question

1) If a car travels 357 miles and uses 21 gallons of gas, how many miles does it average per gallon of gas?

2) Alex is painting a house. He uses 1/3 of the paint he bought on the dining room. He uses twice as much on the living room as on the kitchen, where he uses 1 1/2 gallons. He has 1 1/2 gallons of paint left. How much paint did Alex buy?

Answer 1

357mi/21gal = 357/21 m i/gal = 17 mi/gal

dr = 1/3 p
lr = 2k
k = 3/2
p - dr-lr-k = 3/2

p - p/3 - 2(3/2) - 3/2 = 3/2
p = 9