What is the expression in factored form?

9x2 - 12x + 4

a. (3x - 2)2
b. (-3x - 2)2
c. (-3x + 2)(3x - 2)
d. (3x + 2)2

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 not true about kl and mn? what is mn? (show )

Combine the information in the problem and the chart using the average balance method to solve the problem.