The cemetery of an angle has a measure of 20 degrees more than twice the measure of the angle x degrees which equation can be used to find the value of x

D: (2x + 20°) + x° = 180°

Step-by-step explanation:

Supplementary angles add up to 180°, so that rules out A and C as possible answers.

Answer B has only one angle, so that is out too.

2x + 20° represents one angle, and x represents the other angle

the square root of what number? if you add that, then someone will probably answer the question.

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