Simplify. 1/4n - 1/2 / n/5 - 1/20n

Kendra says that she can draw

1/5,6/30 tell if it forms a porportion

A set of data items is normally distributed with a mean of 90 and a standard deviation of 12. Convert 90 to z-score

When Lou Lou Who find Cindy Lou Who in the back room of the Post Office, he thinks she has been practicing Christmas wrapping.

Who is awesome at Algebra?

A motorboat takes 5 hours to travel 100 kilometers going upstream. The return trip takes 2 hours going downstream. What is the rate of the boat in still water and what is the rate of the current?

the county requires 2 teachers for every 45 students. Write a proportion that gives the number t of teachers needed for 315 students.

Solve inequality. Solve for x. Write the solution in interval notation. |x - 2| = 3

The archaeologist plans to count the number x of emissions in a 25 minute interval.

Amy ate 2 1/2 cookies after lunch and 1 2/5 cookies after dinner. How many cookies did she eat altogether