Question

Given f(x) = 7(9- 2) - 4, what is the value of f(-1)?

Answer 1

Evaluating a function means finding the value of the function that corresponds to a given value of x. To do this, simply replace all the x variables with whatever x has been assigned.

We want to evaluate x = - 1 on the function

$f(x)=7(9-2)-4$

Since the function doesn't depend on x, the function evaluated at x = - 1 will be

$f(-1)=7(9-2)-4=7(7)-4=49-4=45$