Solved

Functions

Posted on 2016-08-31
7
72 Views
Last Modified: 2016-08-31
The first part of the solution is easy as its a simple plus , minus. But the next part where it uses some functions is hard. Can you please explain it in a different way.

screenshot.jpgscreenshot2.jpgscreenshot3.jpgscreenshot4.jpgscreenshot5.jpg
0
Comment
Question by:mustish1
  • 5
7 Comments
 
LVL 27

Assisted Solution

by:aburr
aburr earned 250 total points
ID: 41778431
If you are satisfied with the first panel of the solution, fine. It ends with
Yield = (300 -2(10) x (20 + 2)
What do the numbers mean? (explained in panel one).
 Note the 2. What is it?
It is the number of additional trees. You want to find the unknown number of additional trees wanted so call it x.
Replace the 2 with x. You get the equation at the start of panel 2. That equation is solved in the additional panels.
0
 

Author Comment

by:mustish1
ID: 41778441
I am not understanding that how it makes this function?

Then Yield =( 300 – 10x) (20 + x)=.......
0
 

Author Comment

by:mustish1
ID: 41778454
ok I understand this part. How the graph made based on quadratic equation?
a= -10
b= 100
c= 6000
0
Gigs: Get Your Project Delivered by an Expert

Select from freelancers specializing in everything from database administration to programming, who have proven themselves as experts in their field. Hire the best, collaborate easily, pay securely and get projects done right.

 

Author Comment

by:mustish1
ID: 41778462
Also next part where it says:  Complete the square to find the vertex of the parabola. Why not just use the quadratic function? How would I know to add 250 on both sides if i have similar question but different numbers.
0
 
LVL 14

Accepted Solution

by:
ThomasMcA2 earned 250 total points
ID: 41778567
At the beginning of the problem, you were shown what the yield would be for 1 or 2 additional trees.

For 1 additional tree: Yield = (300 -1(10))  (20 + 1)
For 2: Yield = (300 -2(10))  (20 + 2)

What's different between those two? Only the values of 1 or 2. So for an unknown number of trees, replace the 1 or 2 with an X to get your formula:

Yield = (300 -X(10))  (20 + X)

Then transpose that to get:

Yield = (300 -10X)  (20 + X)

Note that 250 was used merely to simplify the formula. The author skipped a step, which is causing your confusion.

They started with this:

-10X^2 + 100X + 6000

And then both added and subtracted 250, for a net change of zero:

-10X^2 + 100X - 250 + 6000 + 250

And then simplified that into:

-10(X^2 - 10X + 25) + 6000 + 250
0
 

Author Comment

by:mustish1
ID: 41778656
Yield = (300 -10X)  (20 + X)

can you please tell me how you get this equation
-10X^2 + 100X + 6000
0
 

Author Closing Comment

by:mustish1
ID: 41778659
I still need more practice. Thank You.
0

Featured Post

Courses: Start Training Online With Pros, Today

Brush up on the basics or master the advanced techniques required to earn essential industry certifications, with Courses. Enroll in a course and start learning today. Training topics range from Android App Dev to the Xen Virtualization Platform.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Originally published Entrepreneur.com Booming numbers of freelancing professionals are changing the face of work. In the United States alone last year, the number of workers freelancing grew from 700,000 to 54 million, according to a Freelancers’…
I've been asked to discuss some of the UX activities that I'm using with my team. Here I will share some details about how we approach UX projects.
Saved searches can save you time by quickly referencing commonly searched terms on any topic. Whether you are looking for questions you can answer or hoping to learn about a specific issue, a saved search can help you get the most out of your time o…
Although Jacob Bernoulli (1654-1705) has been credited as the creator of "Binomial Distribution Table", Gottfried Leibniz (1646-1716) did his dissertation on the subject in 1666; Leibniz you may recall is the co-inventor of "Calculus" and beat Isaac…

776 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question