Help!me!please!i don't know how to solve this.

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?

Wich statement could be used to explain why the function h(x)= x^3 has an inverse relation that is also a function

Solve each equation using the quadratic formula. find the exact solutions. 6n^2 + 4n - 11