Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Linear algebra

Posted on 2016-09-10
3
Medium Priority
?
82 Views
Last Modified: 2016-09-10
These questions are from millions of online tutorials and YouTube websites. I don’t know if I am allowed to ask experts to explain those questions in a different way. They are not homework assignments. I am trying to develop my own web site. Math’s has many ways to solve the problems. Just want to understand them.

1. My question is why the answer is not -4

q4Ans.JPGscreenshot.jpg
0
Comment
Question by:mustish1
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 20

Accepted Solution

by:
n2fc earned 2000 total points
ID: 41792841
As this equation has two variables, any solution of one variable will be another formula with factors rearranged...

The standard "line" formula is "y = mx + b"  
This is called the "slope-intercept" form and expresses the value y in terms of the "slope"  (m in that equation)
and the "y intercept" (b in that equation)...

The y intercept is calculated by setting x to 0 as shown...

You can draw this standard graph by plotting the two intercept points:
x intercept:  (7,0)
y intercept:  (0, -4)
and drawing a straight line connecting them...

Not sure what additional explanations you need?
0
 

Author Comment

by:mustish1
ID: 41792844
Thanks for this detailed information.  The answer -4 is incorrect but the answer 4/7x -4 is correct. I thought -4 would be a correct answer.
0
 

Author Closing Comment

by:mustish1
ID: 41792851
Thank You.
0

Featured Post

VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

Question has a verified solution.

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

Finding a job can be stressful - searches, resume tweaks, and networking events can be super boring. Luckily we're here to help you land your dream job!
EE introduced a new rating method known as Level, which displays in your avatar as LVL. The new Level is a numeric ranking that is based on your Points. This article discusses the rationale behind the new method and provides the mathematical formula…
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…
Where to go on the main page to find the job listings. How to apply to a job that you are interested in from the list that is featured on our Careers page.

721 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