20 points Need some help given area segment and triangle logo missing side.

What is the value of x? enter your answer in the box. photo attached.

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?

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)