90% on a test. If he answered 135 questions correctly, how many questions were on the test?

Each day valerie charges her lunch account for her lunch. If the cost of lunch is $3 then by how much has her lunch account been impacted over a period of 15 days?

Order - 1/20, - 5/8, 0, - 1, - 3/4 from least to greatest

Which line shows the first error?4x+8=2x-10

Simplify the expression: (3 / (4x^2+4x+1)) + ((x+1) / (4x^2-1))

The height, h, in feet of a piece of cloth tied to a waterwheel in relation to sea level as a function of time, t, in seconds can be modeled by the equation h=8cos ((pie/10) t). What is the period of the function?

Numbers like 10 100 thousand and so on are called what

Jack deposited a check into his account for $429.14. Then, he withdrew $429.14 in cash in the same transaction. What is the net amount of Jack's transaction?

The right rectangular prism is packed with unit cubes of the appropriate unit fraction edge lengths. Find the volume of the right rectangular prism in centimeters. (Figure not to scale)

In a group of 45 children there are four times as boys as girls. how many girls are there?

Why is 5x4 greater than 5x1/4