The variable z is directly proportional to x, and inversely proportional to y. when x is 12 and y is 18, z has the value 2.

what is the value of z when x = 19, and y = 22

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?

Atriangle has vertices of (0,3.5), (3,1.5), (0, -1.5). if it is dilated with center at the origin, and a scale factor of 2, what will be the coordinates of the image?

The sum of the abscissa and the ordinate is six