Admin
asked on 2021-06-06 07:42:06
If 5x + 9y = 5 and 125x3 + 729y3 = 120, then the value of the product of x and y is?
0 Answers
Best Answer
Kiki Ralp answered 1 year ago
Antawn Fiennes
replied 1 year ago
Kiki Ralp answered 1 year ago
My suggestion to developers team is to great a tab that we can click on and highlight all the posts we want to get read of and click delete
Antawn Fiennes
replied 1 year ago
Yub, I agree, it would make it so easy to clean up wasted space.
thanks
125x3 + 729y3 = 120
5x + 9y = 5
Cubing both sides
(5x + 9y)3 = (5)^3
125x3 + 729y3 + 3 × 5x × 9y(5x + 9y) = 125
125x3 + 729y3 + 135xy × 5 = 125
120 + 135xy × 5 = 125
135xy × 5 = 5
xy = 1/135
Answer xy =1/135