Answer:
50°
Step-by-step explanation:

Answer:
The answer is D.
Step-by-step explanation:
In similarity, the triangles have the same angles but different length of sides.
(Correct me if I am wrong)
Answer:
-2/3 or 1/2
Step-by-step explanation:
both eqn equal to zero
then we know that
Circumference = 2xpi x r
=2 x 3 x 5
=6 x 5
=30
2x-1=0
2x=1
x=1/2
x+5=0
x=-5
Final answer: B