Figue out the measures

In what organelle does photosynthesis take place?

Solve x+3y=6 and 4x-6y=6 by elimination . show work !

36x2 + 49y2 = 1,764 the foci are located at: (-√13, 0) and (√13,0) (0, -√13) and (0,√13) (-1, 0) and (1, 0)edit: the answer is (- the square root of 13, 0) and (the square root of 13, 0)