How can you tell if a number is devisible by 3?

A merchant buys an old carpet for $25.00. He spends $15.00 to have it restored to good condition and then sells the rug for $50.00. What is the percent profit on his total investment?

The function f (x) = x^2is graphed above. which of the graphs below represents the function g (x) = x^2-3

In laymens terms how do I find the term of a sequence?

What is the inverse function of f (x) = 2x + 1

What is the simplified expression for 4 power 4 multiplied by 4 power 3 over 4 power 5? 40 41 42 43

Multiply each equation by a number that produces opposite coefficient for x or y 4x + 5y = 7 3x-2y=-12

How do I prove the corresponding angles theorem?

Ben thought an assignment would take 20 minutes to complete. It took 35 minutes. What is the percent error in his estimate of the time?

Three less than the product of 8 and a number is equal to 6

Using the diagonals, determine whether or not ABCD is a rhombus? How do I show my work on this?