Camilla Mooney

Mathematics

8 October, 15:04

Edith babysits for x hours a week after school at a job that pays $4 an hour. She has accepted a

job that pays $8 an hour as a library assistant working y hours a week. She will work both jobs.

She is able to work no more than 15 hours a week, due to school commitments. Edith wants to

earn at least $80 a week, working a combination of both jobs.

Write a system of inequalities that can be used to represent the situation.

Graph these inequalities on the set of axes.

Determine and state one combination of hours that will allow Edith to earn at least $80 per week

while working no more than 15 hours.