Find b - a if the graph of ax + by = 7 passes through (2,1) and is parallel to the graph of 2x - 7y = 3.

x+y=90

x=30-y=x

step-by-step explanation:

if you understand you will get the answer

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 .