Question

if 3x-7y=10 and xy=27 find=Xcube+Ycube

Answer 1

Answer:

1672.977

Step-by-step explanation:

first of all find x and y simultaneously

from 3x=10+7y; x=10+7y

3

put this equation into the xy=27

10+7y x y =27

3

10+7y x 3y=27

21y=27 - 10

21y=17

y=0.80

if y is 0.81 , x=10+7 x 0.81

3

x=11.87

x3 +y3

(11.87)3 + (0.81)3

1672.446+ 0.531

1672.977