9-9-9-9-9-9-9-9-9-8-8-8-8-8-7-7-7-7 7-7-7-7-7-6--35-3-5-34-5-4-5-34-353 66386647832648638764872384687384326 478364687326467823648723648723

I think that this would be a great question for a calculator. All you need to do is plug the numbers in, and the calculator will solve the problem for you {although that last number might be a bit long for the calculator:) }

no pictures of the graph

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.