Mary lost 30 pounds. before her diet she weighed 180 pounds. what is the percent of change.
pls , i have to give this by 3: 00 today

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?

Write an equation of the line that passes through the point (2, 3) and is perpendicular to the line x = -1. a) y = 1 b) y = 3 c) y = 0 eliminate d) y = -3