Question

PLEASE HELP!!!!
Assume that the following points are on the graph of this equation. Enter all possible x or y coordinates, either as expressions or as decimals rounded to two places. (Enter your answers as a comma-separated list.)

Answer 1

substitute x=-2 into the equation

Answer 2

\[x^2+y^2=64\]\[\downarrow\]\[(-2)^2+y^2=64\]

Answer 3

I got square root of 60. didn't work(

Answer 4

now rearrange and solve for y

Answer 5

what is wrong with y=√60

Answer 6

Idk....that's why asking(

Answer 7

Oh ok, i forgot negative

Answer 8

Thanks))

Answer 9

well it is right but you can simplify it a bit more
\[√60=√(6\times 10)=√(2\times 3\times2\times5)\]
\[=√(2^2\times3\times5)=2\times√3\times√5\]

Answer 10

so
\[(x,y)=(-2,~2√3√5)\]

Answer 11

can you do b)

Answer 12

Yes, i got the answe)

Answer 13

Help please with that one

Answer 14

draw a picture

Answer 15

hERE ; http://openstudy.com/study#/updates/4f96a134e4b000ae9ecc6f53
PLEASE I HAVE LESS THAN 7 MINS