He variable z is directly proportional to x, and inversely proportional to y. when x is 7 and y is 7, z has the value 2. what is the value of z when x=10, and y=12?

The length of a shadow of the building is 36m. the length of the pole, which is perpendicular to the ground, is 1.9m. the length of the pole's shadow is 1.52m. what is the height of the building?

Secant ac and bd intersect at point e inside f what is the measure of aed if measurements cd equals 30 a b is 50 and cb is 170

Math question.. plz me .. best answer all