The recommended heart rate for weight management exercise and improving cardio fitness, in beats per minute, depends on a person’s age and can be represented by the expression 0.7(220−a). What does the variable in the expression represent?

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?

Write an equation of the line that passes through 9,2 and is parallel to the line y=5/3x+9

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.