Question

I need help solving for X
The answer choices are
-9
10
-11
9​

Answer 1

x = -11

Explanation:

Equations

The image shows a right triangle with angles 70°, 90°, and x+31.

The sum of the internal angles of a triangle is 180°, thus:

70 + 90 + x + 31 = 180

Simplifying:

191 + x = 180

Subtracting 191:

x = 180 - 191

x = -11