Jessica purchased a DVD that was on sale for 12% off. The sales tax in her county is 3%. Let y represent the original price of the DVD. Write an expression that can be used to determine the final cost of the DVD.

Question

anonymous · Answer

Ok, well have you tried to figure it out yet? If so, what did you get?

anonymous · Answer

@nuccioreggie 
Would you like me to write it out for you?

anonymous · Answer

Since y is the original cost, let z represent the final cost. So, we set up the expression, (0.12y + y) - 0.03y = z. That shows first the sale, then the tax. From there, we simplify to get 1.12y - 0.03y = z, then simplify it more to get 1.09y = z. We take away the z, and get that the cost, which is 1.09, or 109%, or y (1.09y).

anonymous · Answer

Does that help any? :)
If so, medal please?

anonymous · Answer

Thanks for the medal!