The foci of an ellipse are located at (-2, 3) & (2,3), where is the center?

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?

Agarden consists of an apple tree, a pear tree, cauliflowers, and heads of cabbage. there are 40 vegetables in the garden. 24 of them are cauliflowers. what is the ratio of the number of cauliflowers to the number of heads of cabbage?

Asap! i'm not good math and i'm lost.