Answer:
A. 26°
Step-by-step explanation:
If ON =OL, then the two triangles are are similar.
The base angles must be equal.

We group the similar terms to obtain:


Divide through by 2 to get:
x=8

Substitute x=8



$9 is discounted from the regular price. If you find the discounted price you get $21. Then subtract the 21 from 30 and you get 9