Someone help me with this answer please

[see below]

Step-by-step explanation:

The triangle shown is a right triangle. I am assuming that the 'x' is the missing angle measurement.

The three angle measures in a triangle add up to 180 degrees.

The third angle should measure 30 degrees.

Hope this helps.

ab will be equal to

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