Consider the diagram of supplementary angles.

Question

the angles are 128 degrees, and 5x degrees
What is the value of x?
A. 10.4
B. 52
C. 61.6
D. 92

Answer 1

We know that supplementary angles add up to 180 degrees.

So, 128 + 5x = 180

Subtracting 128 from both sides gives:

5x = 52

Dividing both sides by 5 gives:

x = 10.4

Therefore, the value of x is A. 10.4.