Answer:
5.5 hours.
Step-by-step explanation:
Didn't I already answer this for you? I gave you the step by step and everything.
Expression: 5c+9y = income
c- Mr. and Mrs. Cox and her one daughter (5 per hour)
y- Mr. and Mrs. Stenvenson and their three kids (9 per hour)
soo it would be 5c+9y
