An alloy of copper and tin is 20% copper. How many pounds of copper must be added to 20 pounds of the alloy to get an alloy that is 50% copper?

Joseph haydn pet store offers wide variety of leashes for dogs. the store purchases one popular type of leash from its manufacturer for $4.38 each. joseph haydn pets marks up leashes at a rate of 238% of cost. what is the retail price of the popular leash?

Is ofat (-25, 0), (25, 0) co- (0, -15), (0, 15)?

The slope of the line whose equation is 3y = 2x - 3 is 2 2/3 3/2