Which of the following equations shows how substitution can be used to solve the following system of equations? y = 2x - 7
3x + 4y = 16

3x + 4y = 16

Step-by-step explanation:

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the  y=   equation shows how... b/c we can just plug y into the 2nd equation and eliminate y and have one variable, x , to solve for  :)

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 .