Answer:

The answer have negative sign.
Step-by-step explanation:
<em>Subtract by 6 both sides of equation.</em>

<em>Simplify.</em>


<em>Divide by -4 both sides of equation.</em>

<em>Simplify to find the answer.</em>

<em>
, is the correct answer</em>
2x-2+x+3+x+11=180
4x+12=180
4x= 168
X= 45
Whenever you face the problem that deals with maxima or minima you should keep in mind that minima/maxima of a function is always a point where it's derivative is equal to zero.
To solve your problem we first need to find an equation of net benefits. Net benefits are expressed as a difference between total benefits and total cost. We can denote this function with B(y).
B(y)=b-c
B(y)=100y-18y²
Now that we have a net benefits function we need find it's derivate with respect to y.

Now we must find at which point this function is equal to zero.
0=100-36y
36y=100
y=2.8
Now that we know at which point our function reaches maxima we just plug that number back into our equation for net benefits and we get our answer.
B(2.8)=100(2.8)-18(2.8)²=138.88≈139.
One thing that always helps is to have your function graphed. It will give you a good insight into how your function behaves and allow you to identify minima/maxima points.
Answer:A
Step-by-step explanation: your answer is A