Answer:
a) 12b
b) 10h+5
Explanation:
a) 12b means $12 x "b" unknown amount of books
b) 10h+5 means $10 x unknown amount of hours babysitting plus $5 gas which is a set cost no matter how many hours babysitting
I don't know if you need to put the $ in your answer or not, based on the directions i would say not.