1. Miriam is starting a lawn mowing business. She bought a mower for $450 and will spend

about $1.20 per hour on gasoline. How many hours will it take for the average cost per hour

for Miriam to do business to be less than $50. If x represents the number of hours she

mows, which inequality shows the average cost per hour for Miriam to do business and what

is the solution? (A.REI.2, A.CED.1)

a. 450 + 1.20x < 50; she can never have an average less than $50

b. 450 + 1.20x < 50; 14 hours

c. 450 + 1.20x < 50; 10 hours

d. 450 – 1.20x < 50; 9 hours