Question

Any answers I need help

Answer 1

Explanation:

A+B=180

(9×+15)×(3×-15)=180

12×=180

×=180\12

×=15 ans,,

Answer 2

(A) 21

Explanation:

5x-15 needs to equal 90 since it is a right angle and 21 makes that true

`(5*21)=105\\105-15=90`