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The larger base of a trapezoid is three times as long as the shorter base, and the height of the trapezoid is 2 inches longer than the shorter base. The area of the trapzoid is 70 square inches. What...

A biker mixed 11 pounds of raisins that cost \$2.30 per pound with peanuts that cost \$4.50 per pound to make a mixture that cost \$3.29 per pound. How many pounds of peanuts did the biker use?

Two planes leave an airport at the same time and fly in opposite directions. One of the planes is flying at 450 mph, and the other plane is flying at 550 mph. In how many hours will they be 2000 miles...

A farmer's land is separated into sections of size whole number 2 fraction 5/6 acres. Suppose there are 10 such sections. How many acres of land does the farmer own?   Write your...

A chemist mixed some 15% peroxide solution with some 6% peroxide solution to make 300 ml of a 9% peroxide solution. How many milliliters of the 15% solution were used?

the problem is as follows, I don't know what the formula should look like.    Mary has been saving her money. She has \$69.00 consisting of \$5 bills and \$1 bills. If she has a total...