Solve system of equation by substitutionx-2y=3, 4x-8y=12

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?

What is the difference between the predicted value and the actual value

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out