Karen purchased a DVD player on sale. The original selling price was $171.50. The sale price was $145.22. Find the percent markdown.

#12 find the value of x. #13 find the value of the variable.

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.