Answer:
Hope this helps!!!!
Step-by-step explanation:
B is the answer I think I spend to much
Answer: 
Step-by-step explanation:
The expression can be simplified by applying the a properties of exponents, specifically the Product of powers, which states that:

Where b is the base and a and c are exponents.
Then simplify it by rewriting the base (
) and adding the exponents of the expression (8 and 9).
You will get the expression simplified and written as a power:

Answer:
5/2
Step-by-step explanation:
Y(2)-Y(1)/ X(2)-X(1)
(27-2)/(1-(-9)
25/10
simplified=5/2
Answer:
x=3
Step-by-step explanation:
15-7x=5x-21
12x=36
x=3