Help!
i have a timed test and need to get this right!

Which point is on the line y=-2+3? (-2,-1) (3,3) (3,-3) (-3,-9)

Find the solution of system of equation y= x-4 y=4x+2

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?