Question

What is the value of x? (5 points)

a
10°

b
11°

c
20°

d
21°

Answer 1

Since supplementary means they add up to 180 set them equal to 180 (10x+70=180) solve and the value of x is 11

Answer 2

x=11°

Explanation:

angles on straight line add to 180°

so 10x+70=180°

10+70=180°

take away 70°

10x=110°

divide by 10

x=11°