(a) To construct a circular flower bed covering 400 square feet of ground, the radius r must satisfy = 400. (b) Tickets to the play are $5 for adults and $3 for children. If A adults and C children attend the play, the total proceeds dmun are 5A + 3C. 5. Alicia, Boris, Carlos, Dan, and Xavier all collect cards. If x denotes the number of cards in Xavier's collection, form expressions for the number of cards in the other children's collections, using the information provided. For example, Alicia has six more cards than Xavier, so Alicia has x + 6 cards. (c) (a) Boris is three cards short of having twice the number of cards as Xavier. (b) Carlos has two more than half the number of cards owned by Xavier. (c) Dan has the same number of cards as Alicia and Xavier combined. 6. Penny is p years old. Form algebraic expressions with the variable p that represent the ages requested. (a) Penny's age in five years (b) Penny's age eight years ago (c) The current age of Penny's little brother, who will be half of Penny's age in two more years (d) The current age of Penny's mother, who was four times Penny's age three years ago 7. Richie weighs a nounds today which is the last day of

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