Hushh buys 3 shirts that each cost the same amount, a pair of pants that cost $12, and he pays with the hundred dollar bill. Which expression represents the amount of change Huang should receive? Select three options

i think it might be a but you might want a second opinion

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15