Sam baby-sat for x hours and earned $75. If he baby-sits for y more hours at the same rate, his total earnings will be $100. Which of the following equations represents this situation?

Question

75 + xy = 100
75 + (75/x) = 100
75+ (75/y) = 100
75 + (75/xy) = 100

Answer 1

The equation that represents this situation is 75 + (75/y) = 100. This is because Sam has already earned $75 and if he baby-sits for y more hours at the same rate, his total earnings will be $100.