What are two common uses of igneous rocks?

given extra points!

Val and tony get paid per project. val is paid a project fee of $44 plus $12 per hour. tony is paid a project fee of $35 plus $15 per hour. write an expression to represent how much a company will pay to hire both to work the same number of hours on a project.

Find the distance between the pair of points a(-1,8) and b(-8,4)

What is the value of the discrimination for the quadratic equation 0=×2+2+×2