I think of a number, add on 7 and then double it. My answer is 8.​

-3

Step-by-step explanation:

-3 + 7 = 4

2 x 4 = 8

we'll this would mean that the dunk tank and the bounce house are the same for 20 hours because the 2 represents that the two activities, and the 20 represents the amount of hours they both are. so with this said, it means that the answer is c. the costs for a dunk tank and bounce house are the same for 20 hours.

c.the costs for a dunk tank and bounce house are the same for 20 hours.

hope this .