Sander usually drinks 3 cups of coffee in the morning. How many liters of coffee does he drink? Round your answer to the nearest tenth.

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?

The square root of 9x plus 7 plus the square rot of 2x equall to 7

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827