Hey can anyone pls answer dis math problem!!

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

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?

Plot the points (0,6), (3,15.8), and (9.5,0) using the graphing tool, and find the function