What is the value of a in the equation 3 a plus b equals 54 when b equals 9?

If angle 2=3x +1 and angle 3=2x +4what is angle 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.

The table represents a function f(x). what is f(3)? a.-9 b.-1 c.1 d.9