Answer:
C. 
Step-by-step explanation:
Replace x with a + 2 and simplify the expression.

Let x = a + 2


Answer:
all reals except 3 & 4
Step-by-step explanation:
recall you cannot have a 0 in the denominator.
any values of x that would produce a 0 in the denominator are excluded from the domain
factor
Factors -3, -4
(x-3)(x-4)
x cannot be 3 or 4
Answer:
59
Step-by-step explanation:
alternate interior angles are congruent