The population of a small town increased by 25% two years ago and then decreased by by 25% last year. The population is now 4500 persons. What was the population before the two changes?

N + 15=9 What's the given variable

If you solve for x in x^2 = 25, you get two solutions 5 and - 5 If you solve for x in x^3=125, would x have three solutions?

A spaceship on a journey between planets would have to recycle as much air and water as possible. Suppose the crew on such a spaceship used 49.35 L of water one day and recycled all but 0.32 L.

Put the following products in order from least to greatest: 5x3/4, 4 1/4x3/4, 1/2x3/4, 3/3x3/4

Joana is 4 years older than her brother. Which of the following expressions shows the sum if their ages if b represents joanas brothers age?

An air conditioning fan makes 125 revolutions per second, how many revolutions will it make if it runs for 30 minutes?

If 1+9+8=1 then 2+8+9=x

How many pounds ante in 60 kilograms

Is the expression 4 (3 + 5) - 10 = 4 x 3 + 5 - 10 true or false? Explain

3x+2 (5x-3) = 7 multi step equation