How many gallons of a 90% antifreeze solution must be mixed with 100 gallons of 30% antifreeze to get a mixture that is 80% antifreeze?

About 60 percent of the human body is composed of water. Write this percent as a fraction in simplest form

The area of a rectangle is 36 cm2. The length of the rectangle is 8 cm. What is the width of the rectangle? cm

Amanda is riding her bicycle. She rides for 17.5 kilometers at a speed of 7 kilometers per hour. For how many hours does she ride?

The domain of an inverse of a relation is the domain of the original relation

a coast redwood tree is about 10 times as tall as an apple tree one of the tallest coast redwood even measured was 254 feet fall how tall would you expect an apple tree to be

Express 11.63 as a mixed number.

Find the value of each expression 30 = 3x2

What is radical 64/8 simplified

After writing a $800 check to pay a bill, a student has a balance of $350 in his account. How much did he have in the account before he wrote the check?

If the length of one of the legs of a right triangle is 10 and the length of the other leg is 24 what is the length of the hypotenuse