Question

Jackie has two jobs. She earns $14/h in Job A and $16/h in Job B. She would like to earn $560 in a week. Let a represent the number of hours she works in Job A, and let b represent the number of hours she works in Job B.
Which function relates the number of hours she works in Job B to the number of the hours she works in Job A?

A. b = -8/7a + 40

B. b = -7/8a + 35

C. b = 7/8a - 35

D. b = 8/7a - 40

Answer 1

560 = 14a+16b
560-14a=16b
b=(560-14a)/16
b=-7/8a+35
Answer is B