You are buying orange juice for $4.50 per container and have a gift card worth $7. the function f (x) = 4.50x -7 represent your total cost f (x) if you buy x containers of orange juice and use the gift card. how much do you pay to buy 4 containers of orange jucie?

$11 hope this helps you

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18