Answer:
Step-by-step explanation:
step 2 is incorrect.
step 2: -40-75+100+200
step 3: -115+300
step 4 : 185
We have the following function:

So if we graph this function we will get the Figure below. Thus, let's study both the equation and the graph to get some conclusions. Therefore, we can assure these statements:
First. The function is defined only for

as shown in the Figure. This is also true because of

where

must be greater (or equal) than zero.
Second. The range of the function are the values of

.
Third. If

creases then

always creases, too.
What is the question you are trying to ask
X/4 - 3
(*make sure to write the division in fraction form as shown for algebraic notation)
Answer: 0.71428 or 5:7 or 5/7
Step-by-step explanation: just divide on a calculator