Question

2 angles are complementary. One of the angles is 30 degrees. The other has a label of 5n + 20. What would "n" have to be?

A. 20
B. 15
C. 10
D. 8

Answer 1

Answer:

D

Step-by-step explanation:

If angles are complementary, that means that they add up to 90 degrees. That means...

30 + (5n + 20) = 90

50 + 5n = 90

50 - 50 + 5n = 90 - 50

5n = 40

n = 8

I hope this helps!