Jenna has 3 red balloons and 5 blue balloons. what is the ratio of the blue balloons. she adds 2 red balloons and remove 1 blue balloons what is the new ratio of the number of red balloons to the number of blue balloon

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7x+8y=-18, 4x-9y=-3 solve the system of equations

Fanny mendelssohn manages all the magazines and paperback books at a local grocery store. she prices many paperbacks to sell at $7.99. the cost to the store is $5.29. what is the markup rate on a paperback book, based on its cost?