For this case we have the following expression:

When making multiplication, the first thing you should keep in mind is the following property:
Same basis, the exponents are added.
We have then:

Rewriting we have:
Answer:
The simplified expression is given by:
Answer:

Step-by-step explanation:
If you "open up" the parentheses, you would get:

Which, if you combine like terms, is:

Hope this helps :)
Answer:
The answer would be A/B=H
Step-by-step explanation:
To get rid of the B that is connected to the H, you would do the opposite of what they used. Meaning since the two were multiplied you would divide them. So, you would take your b and divide it on both sides of the equal sign. B and B cancels each other out so you are left with A/B which equals H.
It would be a because it is a graph
For the second work sheet:
5 2/8 - 4 1/4= 1 so NO
8 3/4 - 7 1/2= 1 1/4 so YES
2 1/8 - 1 7/8= 1/4 so NO
9 5/12 - 8 1/6= 1 1/4 so YES
Sorry if its not enough explanation, hope it helps!