Question

I don’t know how to get it

Answer 1

A

Explanation:

∠ YAX and ∠ WAZ are vertical angles and congruent, thus

4x - 16 = 3x + 7 ( subtract 3x from both sides )

x - 16 = 7 ( add 16 to both sides )

x = 23

Thus

∠ YAX = 3x + 7 = 3(23) + 7 = 69 + 7 = 76° → A

Answer 2

3x+7+4x-16= 180 degrees

7x-9=180

7x=189

x= 27

yax= 3x+7

3*27+7= 81+7 = 88