Answer:
Step-by-step explanation:
Answer:
the first one is x=3
Step-by-step explanation:
Let's simplify step-by-step.

There are no like terms.
Answer:

Answer:
<h2>
67.7</h2><h2 />
Step-by-step explanation:
perimeter = semicircle (x2) + parallelogram side (x2)
= 1/2 π 12 (x2) + 15 (x2)
= 37.7 + 30
= 67.7