A., B., C., D., are NOT true. I think this is a trick question. Lol
For this case, we have the following equation (according to the comments):

First, we factor the quadratic expression in the denominator:

Then, we multiply both sides of the equation by (a-2) (a + 2):

Later, canceling similar terms we have:

We do distributive property on the left side of the equation:

By grouping variables and constant terms we have:

Rewriting we have:

Finally, by clearing "a" we have:

Note: the value of a is a extraneous solution because it makes the denominator of the original equation equal to zero.
Answer:
the student correct, but the value of a= -2 is an extraneous solution
Answer:
A. 40
Step-by-step explanation:
A line is equal to 180 degrees. So 180-20=160. 4x=160, x=40
Answer:
$5
Step-by-step explanation:
I hope this helps :D