Monique needs to buy a baseball for $20, a soccer ball for $15, and a set of tennis balls for $12.

monique has a coupon that gives her a discount of x percent on a baseball. she has a second coupon that gives her a discount of y percent on a set of tennis balls. the third coupon gives her a discount of z percent on her total purchase.

she cannot combine the coupon for the total purchase with the other two coupons. these expressions give both possibilities for the total cost of monique's purchase after the coupons are applied, the variables represent the percentages as decimals.

(1−x)20+(1−y)12+15(1−x)20+(1−y)12+1 5

(1−z)(20+15+12)(1−z)(20+15+12)

which part of the expression represents the price of the set of tennis balls after a coupon was applied directly to them?

Will used 20 colored tiles to make a design in art class. 5/20 of his tiles were red. what is an equivalent fraction for the red tiles?

Asays "we are both knaves" and b says nothing. exercises 24–31 relate to inhabitants of an island on which there are three kinds of people: knights who always tell the truth, knaves who always lie, and spies (called normals by smullyan [sm78]) who can either lie or tell the truth. you encounter three people, a, b, and c. you know one of these people is a knight, one is a knave, and one is a spy. each of the three people knows the type of person each of other two is. for each of these situations, if possible, determine whether there is a unique solution and determine who the knave, knight, and spy are. when there is no unique solution, list all possible solutions or state that there are no solutions. 24. a says "c is the knave," b says, "a is the knight," and c says "i am the spy."

Solve this problem! extra ! 3025/5.5 = a/90.75