30+0+18+25=78 I tried is that what you ment
We have been given that the profit that the vendor makes per day by selling x pretzels is given by the function
. We are asked to find the number of pretzels that must be sold to maximize profit.
First of all, we will find the derivative of our given function.


Now, we will find the critical point by equating derivative with 0 as:





Therefore, the company must sell 300 pretzels to maximize profit and option B is the correct choice.
Subtract 2x from both sides.
3y = - 2x - 12
Divide every term by 3 to get the y-variable by itself.
y = - 2/3x - 4
Since the equation is not in slope-intercept form (y = mx + b), your y-intercept is just the number in the b slot. Y-intercept is - 4 or (0, - 4).
Now to find your x-intercept, plug in 0 where the y-variable is and solve for x.
0 = - 2/3x - 4
4 = - 2/3x
Multiply both sides by - 3/2 to isolate the variable.
4(- 3/2) = x
- 12/2 = x
- 6 = x.
Your x-intercept is - 6 or (- 6, 0).
V=1/3(bh)
One third of base times height