How do i get the answer to number 4

Hello,

You have 7 balloons and in total, they cost 9.1. dollars. To find the unit price per balloon simply divide 9.1. by 7.

You'll get 1.3, OR 1.30. 

To check your answer simply use inverse operations. Multiply 7 by 1.3 or 1.30 (it doesn't matter); you'll end up with the starting value 9.1.

Thus, the unit price per balloon is $1.30.

Faith xoxo