Question

Help me plz plz plz plz

Answer 1

58

Explanation:

The measure of the outer angle is equal to the angles opposite of it. So, 138 = 10x-2+13x+2.

Simplify this into 138 = 23x

Divide to get x = 6.

Take the equation from angle A and substitute x for 6.

10*6= 60. 60-2 = 58.