Answer:
C
Step-by-step explanation:
Let's simplify this expression first:

- In Line 2, we have used distributive property (
) and thus multiplication. - In Line 3, we have combined like terms
<em>Choices A, B, and D can be eliminated as we have done those to simplify the expression.</em>
Thus, "evaluation" -- choice C is the correct answer for this question.
<u>Evaluation</u><u> is when we plug in a specific value in the variables to find a "value/answer" of the expression given.</u>
Answer:
Value of x = 19
Step-by-step explanation:
We know that in a parallelogram opposite sides are congruent.
So, in the given parallelogram side LM ≅ side NO
So, we can write 
Solving the equation to find value of x

So, value of x = 19
Answer:
31.4
Step-by-step explanation:
d = 10
radius times 2 = d
multiply the circle's diameter by pi (3.14).
31.4