Jamie purchased a dvd that was on sale for 15% off. the sales tax in her county is 5%. that i represent the original price of the dvd. write an expression that can be used to determine the final cost of the dvd.
a. y - 0.15y
b. 0.05(0.85y)
c. y - 0.85y + 0.05y
d. 1.05 (0.85y)

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.

Stacey filled her 1/2 cup of measuring cup seven times to have enough flour for a cake recipe how much flour does the cake recipe calls for

Adesigner charges a one time fee of $200 plus $40 an hour for each project. write an expression to represent how much money the designer will make for a project