Janie bought 4 apples and 6 bananas. each apple costs $0.40, and each banana costs $0.60. enter an expression representing the total cost.

total cost = c

c =0.40(4) + 0.60(6)

c = 1.60 + 3.60

total cost = 5.20

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