Write an equation to determine the value of x. Solve for x.

8x+6x+6= 90- complementary shown in the image

14x+6=90

   make +6 a negative 6 and subract both sides

  you get

 14x/14= 84/14

    x= 6

answer: c

(2, -4)

goes 7 to the

(9, 4)

easy

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.