∆ABC is similar to ∆PQR. Corresponds to , and corresponds to . If the length of is 9 units, the length of is 12 units, the length of is 6 units, and the length of is 3 units, then the length of is units and the length of is units.

1/4 because there is 4 grades.

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