A bag contains 4 green marbles, 5 yellow marbles and 6 red marbles. What is the probability of selecting a yellow or red marble? Justify your answer.

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The area of a rectangle is 54x^9y^8 square yards. if the length of the rectangle is 6x^3y^4 yards, which expression represents the width of the rectangle in yards

Billie holiday sells children's clothing for sara vaughn's toddler shop. baby blankets sell for $29.99 after a markup rate based on cost of 109%. find the cost and the markup.