21 is 75% of what number?

I don't get it.

Two telephone poles are 75 feet apart and the poles are each 50 feet tall. what is the distance from the base of one pole to the top of the other pole?

What is the unit rate of y = - 2x

Write 11,760,825 in word and expanded from

Misty purchased a pair of jeans that were originally $24, but were on sale for 1/3 off the total price. How much did she save?

A triangle has two sides that measure 4.56 cm and 8.65 cm. Which could be the measure of the third side?

What does the equation y = x2 represent as a curve in the set of real numbers2?

The printer charges $4 per book to print it, and you spent $3500 on advertising. you sell the book for $15 a copy. How many copies must you sell so that your income from sales is greater than your total cost?

A roller coaster can accommodate 346 rider in 20 minutes. How many riders could ride in 90 minutes?

You have $12 to buy five goldfish for your new fish tank. Write and solve an inequality that represents the prices you can pay per fish.

Adam has 16.45 kg of flour, and he uses 6.4 kg to make hot cross buns. The remaining flour is exactly enough to make 15 batches of scones. How much flour, on kg, will be in each batch of scomes?