Job A pays Edith $4 an hour. Job B pays her $8 an hour. She will work both jobs. She is able to work no more than 15 hours a week. She wants to earn at least $80 a week, working a combination of both jobs.

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

number of hrs at job A -- x

number of hrs at job B -- y

x+y ≤ 15

4x + 8u ≥ 80 or x + 2y ≥ 20

To represent the given situation, we can set up the following system of inequalities:

Let x represent the number of hours Edith works at Job A, and y represent the number of hours she works at Job B.

1) The first constraint is that Edith can work no more than 15 hours a week, so we have the inequality:
x + y ≤ 15

2) The second constraint is that she wants to earn at least $80 a week. We can calculate the total earnings for each job based on the number of hours worked:
Job A's earnings = 4x
Job B's earnings = 8y

To satisfy the condition of earning at least $80, we can write the inequality:
4x + 8y ≥ 80

Therefore, the system of inequalities that can represent the situation is:
x + y ≤ 15
4x + 8y ≥ 80