80 is 20% of what number

What makes math so difficult?

A farmer sells 6.3 kg of apples and pears at the farmers. 2/5 of this weight is apples and the rest is pears. How many kg of pears did she sell at the farmers market

Which of these sentences are propositions? What are the truth values of those that are propositions? a) Boston is the capital of Massachusetts. b) Miami is the capital of Florida. c) 2 + 3 = 5. d) 5 + 7 = 10. e) x + 2 = 11. f) Answer this question.

Today Benjamin put a watch on layaway by making a down payment of 65 and agreeing to pay 12 per month starting next month for 15 month when will he receive the watch

On Wednesday afternoons, eight men play tennis on two courts. They know ahead of time which four will play on the north court and which four will play on the south court. The players arrive randomly at the tennis courts.

If beth washes dishes every day for 14 days how much will she money will she earn

a rectangular prism with a volume of 3 cubic units is filled with cubes with side lengths of 1/4 unit. how many 1/4 unit cubes does it take to fill the prism

Work out the surface area of a cube of edge 3m

If the radius of a flying disc is 7.6 centimeters, what is the approximate area of the disc? 23.864 square centimeters

Suppose you select 2 letters at random from the word compute without replacement. Find each probability. P (2 vowels)