The price of a CD decreased from $20 to $12. What is the percent of decrease?

What is the domain and range of the function f (x) = a^x?

What is one fourth of sixty?

How many times does 56 go into 432

There were 1500 people at a high school football game. student tickets were $2.00 and adult tickets were $3.50. the total receipts for the game were $3825. how many students bought tickets? let a = the number of adult tickets purchased.

Two walls are 26 feet long by 9 feet wide. The other wall is 18 feet long by 9 feet wide. What is the total area of the walls Amelia wants to pint?

Solve for r. 4*r=1/2 Write your answer as a fraction or as a whole or mixed number

24 songs to 78 songs

Mai worked for 12 hours each day for 8 days. Then the next day she worked 7 hours. How many hours did Mai work in all?

Using the expression 7x = 3y, if y is 35, what is x

10x^2-3x-1 axis of symmetry