Because the factors in the numerator cancel with the factors in the denominator. Consider this example:

All of the 6's in the denominator canceled with the 6's in the numerator, and only 3 6's "survived". The opposite can also happen, if there are more terms in the denominator:

So, everything is coherent
Answer:81
Step-by-step explanation:
Because the square root of 81 is 9 which is a perfect square
-1 you change all the x values to -1 and then solve
Answer:
Step-by-step explanation:
The description is too ambiguous to reconstruct the diagram. You need to post the actual diagram.
That diagram is just one way to view division by a fraction. An easier way: DIVIDING by a fraction is the same as MULTIPLYING by the upside-down fraction. For example,
(1/2) ÷ (1/4) = (1/2) × (4/1) = 2
That doesn’t help you answer this particular question, though.