8/6 = 14/x
8x = 84
x = 10.5
The length of GD = 10.5
** I think that is right not positive
(x^2 + 3)(5x + 9)
5x^3 + 9x^2 + 15x + 27
Given: 3y cos x = x² + y²
Define

Then by implicit differentiation, obtain
3y' cos(x) - 3y sin(x) = 2x + 2y y'
y' [3 cos(x) - 2y] = 2x + 3y sinx)
Answer:
$2,424 was collected for the day
31(45)=1395
21(49)=1029
$2,424