Avideo game that usually costs $30.65 is marked down 60%. kelvin determined that the new price of the game would be $18.39. look at kelvin’s work and find his error.

($30.65)(0.60) = $18.39

There is a line with slope 1/a going through the point (a, a²). find the equation of the line perpendicular to this line at this point. (don’t let this problem intimidate you! solve the problem as you would if i’d given you specific values. just use variables instead.)

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?

Which of the following parabolas opens down?