Help please?

a median of a triangle is a line or segment that passes through a vertex and the side opposite of that vertex

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?

Can someone, me with this.i really need with this

If on=8x-8,lm=7x+4,nm=x-5,and ol=3y-6