A jogger ran 4 miles and then walked 2 miles. The average velocity running was 3 miles per hour faster than the average velocity walking. Express the total time for running and walking, T, as a function of the average velocitywalking, x.

In 1990, the population of Bend, Oregon was 722. In 2000, the population had grown to 977.  Using the data above, give an equation that models the population "P" of sisters as a function of time "t."

A college math placement test has 50 questions. The score is computed by awarding 4 points for each correct answer and subtracting 2 points for each incorrect answer. Determine the linear function that would be used to compute the score. Use the function to determine the score when a student gets 35 questions correct.

Jeff delivers pizza for Papa Jim’s Pizza. Papa Jim’s pays Jeff $6.75 per hour. In addition to this hourly rate, Jeff earns $0.65 for every pizza he delivers.     Write the function that describes Jeff’s wages, where x represents the number of pizzas he delivers during a 8-hour shift.       If Jeff works a 8-hour shift and delivers 67 pizzas during his shift, how much money will he earn?