Answer:To evaluate the expression f(x) = 5x - 1 - 6 when x = 9, we substitute the value of x into the expression and simplify.
Let's substitute x = 9 into the expression:
f(9) = 5(9) - 1 - 6
Next, perform the multiplication and subtraction:
f(9) = 45 - 1 - 6
Simplify further:
f(9) = 38 - 6
Finally, perform the subtraction:
f(9) = 32
Therefore, when x = 9, the value of f(x) = 5x - 1 - 6 is 32.