Answer:
First choice
Step-by-step explanation:
The difference quotient in general is
. To get an expression for
, replace x with x + h.
For this question,

Factor
out of the numerator.

3x+3=9
x=2
that way the answer is 9
Answer:
(3x+1)^2
Step-by-step explanation:
The answer to this equation is: 7q +12
Because she cut off a total of 4 inches, the plank is now 133 inches long. Divide 133 by 7 to get her 7 equal parts, and <u>each shelf will be 19 inches.</u>