What’s is this? I don’t know it what is y and x?

56

step-by-step explanation:

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

49%

step-by-step explanation:

when you realize that you dont know just realize i just took a test and im so smart

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8