Evaluate the function f(X)=5x+2

F(-9)

f(x+1)

f(-x)

Evaluate the function f(X)=5x+2

F(-9)

f(x+1)

f(-x)

Tutors, sign in to answer this question.

Hi Betty,

In this problem, you are given a function f(x) = 5x+2 and you are asked to evaluate f(-9), f(x+1), f(-x). Recall that f(x) = y. When we evaluate functions, we substitute the given x-value to find the corresponding y-value of the function.

That means f(-9) would give the y-value of the function f(x) when x=-9.

**f(-9) = 5(-9)+2 = -45+2 = -43
**f(x+1) gives the y-value or in this case, an algebraic expression, of f(x) when the domain is x+1.

Similarly, to find f(-x), we replace the x in the function with -x.

** **

Already have an account? Log in

By signing up, I agree to Wyzant’s terms of use and privacy policy.

Or

To present the tutors that are the best fit for you, we’ll need your ZIP code.

Your Facebook email address is associated with a Wyzant tutor account. Please use a different email address to create a new student account.

Good news! It looks like you already have an account registered with the email address **you provided**.

It looks like this is your first time here. Welcome!

To present the tutors that are the best fit for you, we’ll need your ZIP code.

Please try again, our system had a problem processing your request.