Dylan has 765 cards in his baseball card collection. he sells 153 of the cards. what is the percent of decrease in the number of cards in the collection?

Aheated piece of metal cools according to the function c(x) = (.5)x ? 7, where x is measured in hours. a device is added that aids in cooling according to the function h(x) = ? x ? 2. what will be the temperature of the metal after two hours?

For which pair of functions is (gof)(a)=|a|-2?

Solve the given system of equations. 2y= -x+9 , 3x-6= -15