SOLUTION: I need a little help with dividing this problem: 16x^3/y^4 / divided by 18x^3/-5y^2. My answer was -40/9y^2 but I am not sure if I know what I am doing. Thanks

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: I need a little help with dividing this problem: 16x^3/y^4 / divided by 18x^3/-5y^2. My answer was -40/9y^2 but I am not sure if I know what I am doing. Thanks      Log On


   

Question 74557: I need a little help with dividing this problem:
16x^3/y^4
/ divided by 18x^3/-5y^2.
My answer was -40/9y^2 but I am not sure if I know what I am doing. Thanks
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
%2816x%5E3%2Fy%5E4%29%2F%2818x%5E3%2F-5y%5E2%29
%2816x%5E3%2Fy%5E4%29%28-5y%5E2%2F18x%5E3%29Multiply by the reciprocal of the 2nd fraction
%2816%2Across%28x%5E3%29%2Fy%5E4%29%28-5%2Across%28y%5E2%29%2F18%2Across%28x%5E3%29%29Cancel like terms
%288%2Fy%5E2%29%28-5%2F9%29Simplify
%28-40%2F9y%5E2%29
You got the right answer.