Question

A.) x+7/x-1
B.) x+1/x+7
C.) x-1/x+7

Answer 1

Answer:

C

Step-by-step explanation:

If there is an expression such as:

$\frac{A*B}{A*C}$

we can cancel out A from top and bottom and that will leave us with $\frac{B}{C}$

Note: Let A, B, C, be any algebraic expression

For the problem given, we can simply cut (x+1) from top and bottom by rules of algebra. So the remaining terms are:

$\frac{(x-1)}{(x+7)}$

This is option C

Answer 2

Answer:

C)

Step-by-step explanation:

When you have a*b/c*a, a crosses out, simplifying to b/c:

(x+1)(x-1)/

(x+1)(x+7)

When "crossing out", you are really just simplifying it to 1/1:

1*(x-1)/

1*(x+7)

Which is the same as:

(x-1)/(x+7)

Therefore, C is the correct answer