A) 4x + 5y = 13
5x - 4y = -32

b) 40x + 50y = 130
5x - 4y = 16

c) 20x + 25y = 65
-20x + 16y = 64

d) -4x + 5y = 13
10x - 8y = -32

C) 20x + 25y = 65

−20x + 16y = 64

Explanation:

These two systems are relatively proportionate to each other because the bottom equation was multiplied by −2, while the top equation was multiplied by 5 in order to get two additive-inverse coefficients to eliminate with their variables, which in this case are −20x and 20x. Additive inverses result in zero.

I am joyous to assist you anytime.

step-by-step explanation:

ok one would be money, and the other would be refreshments or something similar. if each bag of popcorn is 5.00 and each drink is half of that that means drinks are 2.50 the proper way to do that would to look and see how much of each you can buy without exceeding a limit of 30.00