Giving brainliest if correct

Use the elimination method to solve the system of equations -x+5y=-4 and 4x+3y=16

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?

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1