Question

Divide and simplify:
((4y-16)/(5y+15)) divided by ((4-y)/(2y+6))

Answer 1

o.o *mind blown*

Answer 2

what about this?
http://www.wolframalpha.com/input/?i=divide+and+simplify+%28%284y-16%29%2F%285y%2B15%29%29+divided+by+%28%284-y%29%2F%282y%2B6%29%29
does (y-4) = (4-y) ?

Answer 3

(y-4) equals -(4-y).

Answer 4

then there will still be a negative 1 in the denominator when they cancel out?

Answer 5

Yes. that would be the case, however now that I think more about it I don't agree with that first answer. if you cancel out everything I get (4/5)/(-1/2)

Answer 6

Which if you make that a multiplication you would get (4/5)*(2/-1) and that equals -8/5.

Answer 7

I don't think the first person got the answer right...now i'm more confused than ever :/
I factored out so I have \[((4(y-4))/(5(y+3))) \div ((4-y)/(2(y+3)))\]
next I want to flip the signs but I still don't think that will give me the right answer...

Answer 8

Okay sorry they didn't. :(
But your on the right track!

If you write it like this it is a little easier.

Answer 9

thank you! i got it now!! is there anything that y cannot equal?

Answer 10

Nope. :D

Answer 11

It can be 871518165498.15651384896 if it wants to.

Answer 12

can you help me do another one with multiplication?

Answer 13

Sure

Answer 14

okay here it is:
multiply and simplify ((x^2+xy-2y^2)/(x^3+x^2y)) times ((x)/(x^2+3xy+2y^2))

Answer 15

I just like seeing it not all in one line...
But you have to do the same thing you did on the previous one, you have to factor everything down to it's simplest form.