Question

(05.02 MC)

Based on the figure below, what is the value of x

1
9
11
15

Answer 1

Hello!

These two angles are complementary. Therefore, they add up to 90°. This gives us the equation below.

5x+15+20=90

5x+35=90

Let's subtract 35 from both sides.

5x=55

We divide both sides by 5.

x=11

Therefore, our answer is C) 11.

I hope this helps!

Answer 2

The 2 angles combined form a right angle which equals 90 degrees.

Add the 2 angles to solve for x.

5x+15 +20 = 90

5x + 35 = 90

5x = 55

x = 55 / 5

x = 11