At 1:52 can we also use <= instead of ≤ ? Will that be correct?

If you are writing the symbol by hand, then you should use "≤". When typing on a keyboard, it is common to use "<=" as it requires no special characters other than what is already on the keyboard. In KhanAcademy exercises, they provide a menu of special symbols so that you can use "≤".

Hi, Small question, I just want to know how can I get the most out of these lectures on Khan academy. Any tip or tricks welcome here ;). Thanks

Pause the video and have a go at the question. This will make you think and help better understand the problem. Also, you can identify any mistakes you might have made and correct them. Do all the exercises, try to get 100%. It's okay even if you don't, the goal here is to practice and learn. Take notes, jot down anything you feel is helpful. (I like to summarize each topic to one page so I can quickly go through everything.) Don't give up if you don't understand something. Take a short break, maybe listen to some music. Come back and try again. If you are stuck, you can also ask for help in the comments section. This article has more ideas: https://www.khanacademy.org/khan-for-educators/resources/students/resources-for-students/a/seven-tips-for-making-the-most-out-of-khan-academy Good luck!

When graphing less than or less than and equal to 1500 calories/day, you shade the number line in so that it goes below zero into the negative. How can you consume a negative number of calories in a day?

Of course, to consume negative calories you would not be gaining any calories, but losing them. Meaning you would be working out and burning them. To answer your first question, he shaded the arrow at zero which shows it can be any negative number beyond zero as well. So we displayed that on the number line.

probably not your most appropriate example.

He means the calories as an example can be triggering for some people. Especially when it comes to counting calories.

Main content

Operations and Algebraic Thinking 222-226

Course: Operations and Algebraic Thinking 222-226 > Unit 2

Lesson 7: One-step inequalities

Plotting inequalities

Name: Plotting inequalities
Uploaded: 2013-07-16T15:28:59Z
Description: To plot an inequality, such as x>3, on a number line, first draw a circle over the number (e.g., 3). Then if the sign includes equal to (≥ or ≤), fill in the circle. If the sign does not include equal to (> or <), leave the circle unfilled in. Finally, draw a line going from the circle in the direction of the numbers that make the inequality true.

Google Classroom

To plot an inequality, such as x>3, on a number line, first draw a circle over the number (e.g., 3). Then if the sign includes equal to (≥ or ≤), fill in the circle. If the sign does not include equal to (> or <), leave the circle unfilled in. Finally, draw a line going from the circle in the direction of the numbers that make the inequality true. Created by Sal Khan.

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Stephen Allen
Posted 5 years ago. Direct link to Stephen Allen's post “At 1:52 can we also use <...”
At
1:52
can we also use <= instead of ≤ ? Will that be correct?
Button navigates to signup pageComment on Stephen Allen's post “At 1:52 can we also use <...”
(22 votes)
Answer
- Kim Seidel
  Posted 5 years ago. Direct link to Kim Seidel's post “If you are writing the sy...”
  If you are writing the symbol by hand, then you should use "≤". When typing on a keyboard, it is common to use "<=" as it requires no special characters other than what is already on the keyboard.
  In KhanAcademy exercises, they provide a menu of special symbols so that you can use "≤".
  Comment on Kim Seidel's post “If you are writing the sy...”
  (27 votes)
Himanshu Bisht
Posted 3 years ago. Direct link to Himanshu Bisht's post “Hi, Small question, I jus...”
Hi,
Small question, I just want to know how can I get the most out of these lectures on Khan academy. Any tip or tricks welcome here ;).
Thanks
Button navigates to signup pageButton navigates to signup page
(11 votes)
Answer
- NatureNotes
  Posted 3 years ago. Direct link to NatureNotes's post “Pause the video and have ...”
  Pause the video and have a go at the question. This will make you think and help better understand the problem. Also, you can identify any mistakes you might have made and correct them.
  
  Do all the exercises, try to get 100%. It's okay even if you don't, the goal here is to practice and learn.
  
  Take notes, jot down anything you feel is helpful. (I like to summarize each topic to one page so I can quickly go through everything.)
  
  Don't give up if you don't understand something. Take a short break, maybe listen to some music. Come back and try again.
  If you are stuck, you can also ask for help in the comments section.
  
  This article has more ideas: https://www.khanacademy.org/khan-for-educators/resources/students/resources-for-students/a/seven-tips-for-making-the-most-out-of-khan-academy
  
  Good luck!
  Comment on NatureNotes's post “Pause the video and have ...”
  (26 votes)
Marcus Barbera
Posted 6 years ago. Direct link to Marcus Barbera's post “When graphing less than o...”
When graphing less than or less than and equal to 1500 calories/day, you shade the number line in so that it goes below zero into the negative. How can you consume a negative number of calories in a day?
Button navigates to signup pageComment on Marcus Barbera's post “When graphing less than o...”
(9 votes)
Answer
- shahzi
  Posted 3 years ago. Direct link to shahzi's post “Of course, to consume neg...”
  Of course, to consume negative calories you would not be gaining any calories, but losing them. Meaning you would be working out and burning them.
  To answer your first question, he shaded the arrow at zero which shows it can be any negative number beyond zero as well. So we displayed that on the number line.
  Comment on shahzi's post “Of course, to consume neg...”
  (3 votes)
James Bomer
Posted 6 months ago. Direct link to James Bomer's post “probably not your most ap...”
probably not your most appropriate example.
Button navigates to signup pageComment on James Bomer's post “probably not your most ap...”
(4 votes)
Answer
- Lillia Capps
  Posted 6 months ago. Direct link to Lillia Capps's post “He means the calories as ...”
  He means the calories as an example can be triggering for some people. Especially when it comes to counting calories.
  Comment on Lillia Capps's post “He means the calories as ...”
  (11 votes)
jcoraci
Posted 9 months ago. Direct link to jcoraci's post “Hi why is it less than ju...”
Hi why is it less than just asking
Button navigates to signup pageButton navigates to signup page
(2 votes)
Answer
- chanakostiner
  Posted 6 months ago. Direct link to chanakostiner's post “What do you mean”
  What do you mean
  Button navigates to signup page
  (1 vote)
Aldrin Jobi
Posted 3 years ago. Direct link to Aldrin Jobi's post “I have a challenge for al...”
I have a challenge for all Khan academy learners;

Mr. Monroe keeps a bag of small prizes to distribute to his students. He likes to keep at least twice as many prizes in the bag as he has students. The bag currently has 79 prices in it. Mr. Monroe has 117 students. How many more prizes does he need to buy.

Write the answer as a comment in an Inequality equation

For example 5000<=83x+850
Button navigates to signup pageComment on Aldrin Jobi's post “I have a challenge for al...”
(4 votes)
Answer
- Hopper
  Posted 2 years ago. Direct link to Hopper's post “Prizes = p Needs: 117*2p...”
  Prizes = p
  
  Needs: 117*2p prizes.
  Has: 79 prizes.
  Will buy: 234p - 79p = 155 prizes.
  He likes to keep atleast double the amount of prizes as students. Thus, our equation is:
  p≥155
  
  (Did I do it right? 🤔)
  Comment on Hopper's post “Prizes = p Needs: 117*2p...”
  (0 votes)
˙𐃷˙
Posted a year ago. Direct link to ˙𐃷˙'s post “Wait, so for all of the n...”
Wait, so for all of the number lines, should there be a minimal amount of 0 whatever?
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(3 votes)
Answer
- 🅹🅾🅷🅽🅽🆈
  Posted a year ago. Direct link to 🅹🅾🅷🅽🅽🆈's post “Not necessarily. For some...”
  Not necessarily. For some and actually many number lines, zero is not the least number. It really just depends on the problem. If negative numbers can be included with the problem still being valid, it is not logical for zero to be the least number of value.
  Button navigates to signup page
  (0 votes)
Olive/Liv
Posted 2 years ago. Direct link to Olive/Liv's post “≥o≤ It makes 99.9% sense”
≥o≤ It makes 99.9% sense
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(2 votes)
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candy.huang
Posted 10 months ago. Direct link to candy.huang's post “i do have a question”
i do have a question
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eddy.yu
Posted 10 months ago. Direct link to eddy.yu's post “how you do this”
how you do this
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Video transcript

the amount of water I intake. And so let's define some variable. Let's say W is equal to the number of ounces of water I consume per day. And I've read that I should have at least-- let me throw out a number-- 64 ounces of water per day. There's one way I could think about, where I always want to drink more than 64 ounces, so that would be W is greater than 64. W here is the thing that I want to be bigger, so the opening is to the W. W is greater than 64 ounces. How would I depict that? Well, let me do my number line right over here. Let's say that this is 0. This is 64. If I wanted to make strictly greater than, so in this situation it's not cool if I just drink exactly 64. That 64 is not greater than 64. I have to drink 64.01 ounces or 0.00001 ounces. It has to be something that is greater than 64. So I'm not going to include 64, but anything greater than that is completely cool. Now, what if I want to loosen things a little bit? It's OK if I drink exactly 64 ounces or more. Well, then I could write W is greater than or equal to 64. And the way that I would be depict that on the number line-- and obviously, I'm not showing all the numbers in between-- let's say this is 0, and then we go all the way up to 64. Well, now it's OK if I drink exactly 64 ounces, so I'm going to fill in the circle now. Here I opened it because 64 was not a cool number. Now, 64 is completely OK. I can drink exactly 64 ounces of water in the day or more, and then I just go up the number line just like that.