What operations do you use when factoring to get the “c” or last number?
A. add
B. subtract
C. multiply
D. divide

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

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.

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).