What is this? I don't know and I'm struggling bad please help

Acar travels at an average speed of 52 miles per hour. how long does it take to travel 299 miles

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

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.