How much pure antifreeze must be added to 12 gallons of 20% antifreeze to make a 50% antifreeze solution?

A musician is planning to market a CD. The fixed costs are $1140 and the variable costs are $4 per CD. The wholesale[..]

The length of a rectangle is 4 cm more than twice its width. If the perimeter of the rectangle is 32 cm, find the[..]

A square garden plot measures 125 square feet. a second square garden plot measures 405 square feet. how many more[..]

The sum of -4 and 5 times a number is multiplied by 3. The result is 212 less than 7 times the number. What is the[..]

an architect has planned a living room in a house. the room is a rectangle 12 feet by 10 feet. he decides to double[..]

The volume of a rectanguler Chinese box is given by the formula V=LWH. The volume of the box is 288 cu. units. Find[..]

The product of two consecutive positive integers is 11 more than their sum. Find the integers.

Lily was in the middle rung of a ladder. She went up 3 rungs, then down 5 rungs and then up 7 rungs where she[..]

the fastest time for 1 mile run at high school until yesterday was 5min 10sec. yesterday brooke broke the record by[..]