by 
Anonymous
ANSWERS: 3
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please someone help
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I already helped you with one of your problems earlier this morning. You need to do your own homework now. If you don't understand a concept, then post that question -- not just a list of problems that need solving.
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These are all the facts you need: In the following * means multiply. (A/B)*(C/D) is the same as (A*C)/(B*D) whatever number expressions A,B,C,D stand for. xy means the same as x*y. That works for numbers too. x^2 means the same as x*x Similarly y^2 means the same as y*y x^3 means the same as x*x*x If in a fraction, both the numerator (top) and the denominator (bottom) are multipled by a y, these particular two y can be cancelled (crossed out). That works with numbers, such as 20 as well. Right, I reckon you knew ALL that already, so how come you were stuck?
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