Length of a trip in 24 hour time | Math | Khan Academy

2m read

·Nov 10, 2024

Hello! So we're told Colette rides her bike home from school every afternoon. She leaves school at 14:55 and arrives home at 15:25. How long does she ride her bike? So pause this video like always and see if you can answer that question: how long is her bike ride home?

All right, now to help us answer that question, I'm going to set up a timeline. So that's my timeline there, and let's say that everything is going on between 14 hours and it looks like between, actually, past 15 hours. So I'll go to 16 hours. So that is hours, and this is 15 hours, and then 16 hours would be maybe right over there 16 hours.

And this would be 14 and a half, just to make things a little bit clearer. This would be 15 and a half, just like that. Actually, it'd be a little bit— it would be something like that. And so let's see, she leaves school at 14:55. Where is that on this timeline? Well, 14:55 is 5 minutes before 15.

So it's going to be roughly right over here, so that is when Colette leaves. So that is 14:55, and then when she arrives, 15:25, that's 25 minutes after 15 hours, so that is right over there. So this right over there is when she arrives home, 15:25.

And so how long is that? Well, the way I think about it is if we go from 14:55 to 15:00, that is 5 minutes. So this part right over there is five, and then to go from 15:00 to 15:25, that's another 25 minutes.

So the total length of her trip in time is going to be 5 minutes plus 25 minutes. 5 plus 25 is 30. 30 minutes, and we are done.

Lifesaving Medicines from Venomous Animals - Meet the Expert | National Geographic

The Auto Market Bubble Just Popped

View All

How you're going to die..

Ashes to ashes, dust to dust. From sand we came, to sand we’ll return. No matter what we do, no matter how hard we try, one day we’re living, the next we’re clocking out for the long nap. We all know this, but still, the thought of death is extremely scar…

How to finance a private jet

Will you take bank financing on the air? Correct. Okay, so that’s a key question because a bank, if they’re going to loan money to you, usually what they say is the term of the loan plus the age of the airplane should not exceed 20 years. So, meaning at…

15 Signs You Are Financially Mature

You know, up until a certain point in life, money comes and money goes, and that’s about it. You just made a couple of purchases, you’ve got a stable place, a stable income, and things seem to settle. At this point, you start to be more financially mature…

How The Economic Machine Works: Part 3

[Music] As economic activity increases, we see an expansion. The first phase of the short-term debt cycle—spending continues to increase and prices start to rise. This happens because the increase in spending is fueled by credit, which can be created inst…

Bitcoin For The Intelligent Layperson. Part Two: Public Key Cryptography.

[Music] Bitcoins aren’t physical coins, but they’re not files on a computer either. They’re really numbers in a public ledger called the blockchain. This contains a record of every Bitcoin transaction that has ever happened. You can think of a transaction…

Finding features of quadratic functions | Mathematics II | High School Math | Khan Academy

So I have three different functions here. I know they’re all called f, but we’ll just assume they are different functions. For each of these, I want to do three things. I want to find the zeros, and so the zeros are the input values that make the value of…

Length of a trip in 24 hour time | Math | Khan Academy

More Articles