What is f (x) = - 2x + 7 where x = - 5?

Answer: 17

Explanation: In this problem we're given the function f (x) = - 2x + 7 and we are asked to find f (-5).

In other words, if we put an x into our function, we get a - 2x + 7 out so we want to figure out what will happen when we put a - 5 into the function.

Well if we put a - 5 into the function, that's f (-5) and we get a - 2 * - 5 + 7 out. Or, f (-5) = 10 + 7. Now all we have to do is simplify on the right side to get f (-5) = 17.

Solve the function f (x) = - 2x + 7 where x = - 5.

~Fill in for x

f (5) = - 2 (-5) + 7

~Multiply

f (5) = 10 + 7

~Simplify

f (5) = 17

Thus, the answer is 17.

Best of Luck!