Solving inequalities

Question

Last month 7th graders washed cars for 8 dolars each with an additional 5 dolars fee for supplies to raise money for school. They made at least 250 dolars. How many cars did the students need to wash to reach their mininum

Answer 1

They paid $5 for supplies

They charged $8 per carwas

They needed to earn at least $250

 

Letting c = # cars washed

 

8c - 5 ≥ 250

8c ≥ 255

c ≥ 31.875

They need to wash at least 32 cars