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

Solve the system of equations. y= 2x y= x^2 - 15

A50% increase followed by 33 1/2% decrease

The? half-life of a radioactive substance is 20 years. if you start with some amount of this? substance, what fraction will remain in 120 ? years