The height of a hill, h(x), in a painting can be written as a
function of x, the distance from the left side of the painting
Both hix) and x are measured in inches
What is the height of the hill in the painting 3 inches from
the left side of the picture?
() --
0
-13
6 inches
13 inches
30 inches
150 inches

First option:

Step-by-step explanation:

You have the following function provided in the exercise:

You know that represents the height of the hill (in inches) and "x" represents the distance from the left side of the painting (in inches)

Knowing that you can determine that, if the painting 3 inches from the left side of the picture, the value of "x" is the following:

Therefore, you need to find the value of   when   in order to solve this exercise.  

So, the next step is to substitute   into the function:

And finally, you must evaluate in order to find .

You get that this is:

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^