Evaluate 1/3m-1-1/2n when m=21 and n=3/12

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?

When only separate discreet points are graphed it is called?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10