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
How Many Photos Have Been Taken?
Hey, Vsauce. Michael here. In 1826, this became the very first photograph ever taken. And in 1992, this became the very first image ever uploaded to the web. But how many photographs have we all taken, altogether, throughout all of history? Well, 1000memo…
Partial derivatives and graphs
Hello everyone. So I have here the graph of a two variable function, and I’d like to talk about how you can interpret the partial derivative of that function. So specifically, the function that you’re looking at is f of x, y is equal to x squared times y…
Can a Haircut Change Your Life? | The Story of Us
I’m in London to meet Joshua Coombes. He’s a hairdresser. And he believes small acts of love can make a big impact. Joshua hopes he can help the homeless, not by offering them money or food but by giving them a haircut. The reason I started cutting hair …
This 18th Century Gold Rush Changed How the World Pans for Gold | National Geographic
Gold is the most powerful metal on earth, and Russia is one of the world’s leading suppliers of it. It all began in 1745 when a peasant named Tiara Fade Markov, while looking for crystal, found something else: a tiny gold speck inside a piece of quartz. H…
How to Start Investing in Stocks in 2021? (w/ @Value-Investing)
Hey guys, welcome back to the channel! In this video, I’m super excited. I got to do a sit down, kind of quick 20-minute interview with Sven Carlin. Of course, you guys all know Sven from over on his YouTube channel. The topic of this conversation was how…
Divergence formula, part 1
Hello everyone. So, now that we have an intuition for what divergence is trying to represent, let’s start actually drilling in on a formula. The first thing I want to do is just limit our perspective to functions that only have an x component, or rather w…