Determine if the relation is a function (10,8) (12,4) (15,15) (9,4)

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

Isabel graphed the following system of equations. 2x – y = 6 y = -3x + 4 she came up with the solution (2,-2). what were the 3 steps she did to get that solution? (make sure they are in the correct order)

The ratio of the height of two similar cylinders is 4 to 3 what is the ratio of their volumes