yego.me
💡 Stop wasting time. Read Youtube instead of watch. Download Chrome Extension

Inequalities word problems | 6th grade | Khan Academy


2m read
·Nov 10, 2024

We're told that Eric is shorter than Preethi. Preethi is 158 centimeters tall. Write an inequality that compares Eric's height in centimeters, E, to Preethi's height. Pause this video and see if you can do that.

All right, so we have Eric's height, which we are using the variable capital E for. How does it compare? It says Eric is shorter than Preethi, so Eric's height is going to be less than whatever Preethi's height is, which is 158 centimeters. You could think about it on a number line too. If I were to draw a number line like this, and this is 158 centimeters, Preethi's height, Eric's is going to be less than that because he is shorter. So it would be all of the values that are to the left of—let me do this in another color—that are less than that.

Just like that, let's do another example here. We are told that Sydney wears skirts when the temperature is warmer than 25 degrees Celsius. Write an inequality that describes T, the temperatures at which Sydney wears skirts. So again, pause this video and see if you can have a go at that.

All right, so when does Sydney wear skirts? When the temperature is warmer than 25 degrees Celsius. Now, warmer means that the temperature is higher than 25 degrees Celsius or that the temperature is greater than 25 degrees Celsius. And we're using capital T to denote temperature. So we would say capital T needs to be higher than 25 degrees or greater than 25 degrees Celsius. So T is greater than 25.

Let's do one last example here. So here we are told that Lola and Haley are running a race. Lola finishes the race in 53 seconds. Haley finishes after Lola. Write an inequality that represents H, Haley's finish time in seconds. Pause the video and see if you can think about this.

All right, so how does Haley compare to Lola? Haley finishes after Lola, so what does that mean about Haley's time? Well, that means that Haley is going to take more time than Lola to finish the race. So whatever Lola's time is, Haley's time is going to be longer or more or greater than. So Haley's time is going to be greater than Lola's time, which is 53 seconds because Haley finishes after.

More Articles

View All
Barry Sloane: Playing Edward Winslow | Saints & Strangers
Edie Winslow was an emissary between the Saints and the Peconic tribe. Two knives, comprised of fine steel with ornate design, served as a symbol of strength or civic trust. He was a great friend of William Bradford’s and later would go on to not only be …
Photoperiodism | Plant Biology | Khan Academy
So one question that biologists have long asked is: how do plants know what to do at different times of the year? One mechanism by which they know, kind of, you could say what time of year it is, is through photoperiodism. “Photo” for light and then “peri…
Warren Buffett's Advice for Young People Who Want to Be Rich
I tell people if they’re going in the investment business, if you got 160 IQ, sell 30 points to somebody else because you won’t need it. I mean, that it, yeah. I mean, I figured out very early you don’t have to be that smart in this business, which is for…
London is the centre of the world
The world changed a lot. It’s like a moving chessboard. London was the gateway, not only to Europe but really to the financial world outside of New York. New York now, from my perspective, has sort of gone away from being that financial hub. But at the en…
Emphatic pronouns | The parts of speech | Grammar | Khan Academy
All right, grammarian, so we know that there’s one way to use this thing we call reflexive pronouns, and that’s to say you’re doing something to yourself, as in the sentence, “I made myself breakfast.” Right? I’m making myself breakfast, or in the sentenc…
What’s Worth More: $100 SAVED or $200 EARNED?
What’s up you guys? It’s Graham here. So, here’s an interesting question for you to think of: What’s worth more money, the hundred dollars that you save or the hundred dollars that you earn? If you had the option to pick one or the other, which one will …