Find the value of the following expression.
9(-4)
———
-3

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

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.