Find the missing side lengths please help ​

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?

Divide. reduce the answer to lowest terms.5 2/3 ÷ 3 1/9

What is the solution set of the quadratic inequality x^2-5< or equal to 0