SOLUTION: If xy=10, what is the value of 2 X x/y X {{{y^2}}}?

Algebra ->  Expressions -> SOLUTION: If xy=10, what is the value of 2 X x/y X {{{y^2}}}?      Log On


   

Question 94825: If xy=10, what is the value of 2 X x/y X y%5E2?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
2%28x%2Fy%29y%5E2 Start with the given expression

2%28x%2Fy%29y%2Ay Rewrite y%5E2 as y


2%28x%2Fcross%28y%29%29y%2Across%28y%29 Cancel like terms


2xy Simplify

2%2810%29 Plug in xy=10

20 Multiply


So 2%28x%2Fy%29y%5E2=20 if xy=10