Question

suppose you have a job teaching swimming lessons and get paid $9 an hour. you also have a job as a cashier and get paid $7/hr. If you cannot work more than 20 hours a week, what are the number of hours you can work ar each job and still make at least $160?​

Answer 1

B

Explanation:

In A, it says that 9s +7c can be lower or equal to 160. This is wrong.

In C, it says that 9s +7c can only be higher than 160, when the question says at least, which means it can also be equal to 160, making it wrong.

In D, it says that 9s +7c can be lower or equal to 20. This is wrong.

Through elimination, only B can be right.