Question

One angle is 10 less than four times another angle. If the two angles are supplementary what is the measure of each angle? Find the correct equation one can use to solve this problem.

Question 6 options:

a)

(x−10)+x=180


b)

(4x−10)+x=180


c)

4x+10=180


d)

x+(4x−10)=90

Answer 1

Supplementary angles must add up to 180. Let x equal "another angle." "One angle" is ten less than four times x. This would look like: 4x-10. 4x-10 and x must add up to 180: (4x-10) + x =180. This is choice B.