The rule for a pattern is add 4 to the input. Explain how you can use the rule to write ordered pairs that represents the pattern.

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20