I will mark brainliest Select all the sets of conditions that will form only one unique triangle. A Two angles and an included side
B Two sides and a non-included angle
C Two sides and an included angle
D All three sides
E All three angles

d

step-by-step explanation:

d

-2 is the right

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