What is f(3) if f(x) = - 4x + 1 ? ​

Here is the equation:

f(r)=4r+1

You need to find f(3). To do that, substitute all the x's with 3:

f(r)=4r+1->f(3)=4x3+1

The first thing you need to do is multiply 4 by 3. Multiply:

4x3=12

Here is your new equation:

f(3)=12+1

To get your answer, you need to add 12 and 1. Add:

12+1=13

That means:

f(3)=13

If you have any questions, feel free to ask in the comments! :)

Step-by-step explanation:

it has changed from the width and the height.

step-by-step explanation:

the answer would be 0.54