Question

Could someone please check these substitution problems for me??

1. { 7y^2 +x^2 = 64
{ x+y=4

For my answer I got x = 1.07.



2. { x^2+y^2+2x+2y=0
{x^2+y^2+4x+6y+12=0

For my answer I got x=0.

Answer 1

what did u get for y?

Answer 2

I don't agree with # 1.

Answer 3

And I don't agree with # 2 either.

Answer 4

Thank you so much @dalia_lam , do I still have to solve for y in the first problem?

Answer 5

you can if you want to :), just plug the value in for x

Answer 6

so y2= 3 and y1= +/- 2? and for the second one would we just plug in x as well?