Question

Ben earns $9 per hour and $6 for each delivery he makes. He wants to earn more than$155 in an 8-hour workday. What is the least number of deliveries he must make to reach his goal?

Answer 1

8 hours is given
8*9=72

now deliveries
72+delivieries>155
deliveries=6 times number of deliveries (let's say 'd')
72+6d>155
minus 72 both sides
6d>83
divide both sides by 6
d>13.83
can't make 0.83 delivieries, round up
d=14


needs to do at least 14 deliveries

Answer 2

$ 9 per hr for 8 hrs = (9 * 8) = $ 72

6x + 72 > 155
6x > 155 - 72
6x > 83
x > 83/6
x > 13.83...so the least number of deliveries would be 14