Janet can wax her car in 2 hr(s). When she works together with Helga, they can wax the car in 45 min(s). How long would it take Helga, working by herself, to wax the car?

How do you use the additive inverse to evaluate an expression that uses subtraction in a full sentence

Astudent received the following grades last semester. find the student's semester grade point average. an a is algebra (3 credits), a b in history ( 3 credits), a in sociology ( 3 credits) a d in english ( 3credits) and a c in seminar ( 2credits). an a is worth 4 points, a b is worth 3 points a c is worth 2 points and a d is worth 1 point.

An energy plant is looking into putting in a system to remove harmful pollutants from its emissions going into earth's atmosphere. the cost of removing the pollutants can be modeled using the function c = 25000p/100 -p what is the vertical asymptote?