Log5 (x squared - 9) = 0

For what value of x does 4x = (1/8) x + 5?

The level of co2 emissions, f(x), in metric tons, from the town of fairfax x years after they started recording is shown in the table below. x 2 4 6 8 10 f(x) 26,460 29,172.15 32,162.29 35,458.93 39,093.47 select the true statement.

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g