At 1:34, when Sal put the three other tiles into the "not used" section, one tile was 0.75p. This made me think that another way to solve the total bill could have been 2p-0.75p. That would have simplified to 1.25p. Is my way of thinking also applicable to the problem?

What does 2P - .75p mean? 2P would be the cost of two ponies, and then you would have had to add 25% tax so that would be 2P(.25) = .50P, so cost of 2 ponies would be 2.50P, divide by 2 to get 1 to be 1.25P. .75P has no meaning within the context of the problem that I can figure out.

When Khan Academy makes a Borderlands reference

seriously, i am losing my mind right now

Why is handsom jack buying a pony made out of diamonds

Because then he could brag to his friends about having something so expensive.

I'm confused. why is there more then one way to do a problem. so annoying.

See the problem has different methods because later on you will be using that method and adding on to that for like calculus. Take cross multiplacation for instance you can do the ratio method but then when you go to calculus you wont be able to use the ration method only the cross multiplication method will work.

Main content

Operations and Algebraic Thinking 222-226

Unit 2: Lesson 3

Interpreting linear expressions

Interpreting linear expressions: diamonds

Name: Interpreting linear expressions: diamonds
Uploaded: 2013-08-09T20:31:22Z
Description: We match the expressions to their meaning in this example. We're reinforcing our knowledge of linear expressions.

Google Classroom

We match the expressions to their meaning in this example. We're reinforcing our knowledge of linear expressions. Created by Sal Khan.

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Lamborgini
Posted 9 years ago. Direct link to Lamborgini's post “I'm confused. why is ther...”
I'm confused. why is there more then one way to do a problem. so annoying.
(0 votes)
Answer
- mukund
  Posted 6 years ago. Direct link to mukund's post “See the problem has diffe...”
  See the problem has different methods because later on you will be using that method and adding on to that for like calculus. Take cross multiplacation for instance you can do the ratio method but then when you go to calculus you wont be able to use the ration method only the cross multiplication method will work.
  (3 votes)
Musa Sayed
Posted 5 years ago. Direct link to Musa Sayed's post “At 1:34, when Sal put the...”
At
1:34
, when Sal put the three other tiles into the "not used" section, one tile was 0.75p. This made me think that another way to solve the total bill could have been 2p-0.75p. That would have simplified to 1.25p. Is my way of thinking also applicable to the problem?
(5 votes)
Answer
- David Severin
  Posted 5 years ago. Direct link to David Severin's post “What does 2P - .75p mean?...”
  What does 2P - .75p mean? 2P would be the cost of two ponies, and then you would have had to add 25% tax so that would be 2P(.25) = .50P, so cost of 2 ponies would be 2.50P, divide by 2 to get 1 to be 1.25P. .75P has no meaning within the context of the problem that I can figure out.
  (6 votes)
Elijah Foxx Sherman
Posted 4 years ago. Direct link to Elijah Foxx Sherman's post “When Khan Academy makes a...”
When Khan Academy makes a Borderlands reference
(2 votes)
Answer
- Threnody Hammond
  Posted 2 years ago. Direct link to Threnody Hammond's post “seriously, i am losing my...”
  seriously, i am losing my mind right now
  (10 votes)
Oli Silver
Posted 9 months ago. Direct link to Oli Silver's post “This unlearns everything ...”
This unlearns everything I learnt in elementary
(4 votes)
Answer
- David Severin
  Posted 9 months ago. Direct link to David Severin's post “What did you learn in ele...”
  What did you learn in elementary? There is no such thing as a pony made of diamonds?
  (1 vote)
mr B. Bun's
Posted 2 years ago. Direct link to mr B. Bun's's post “how did jack afford the d...”
how did jack afford the diamond horse?
(4 votes)
Answer
Peyton Knowles
Posted 2 years ago. Direct link to Peyton Knowles's post “so if the tax so impotent...”
so if the tax so impotent why did they just do nothing
(3 votes)
Answer
- celiajoswoboda
  Posted 4 months ago. Direct link to celiajoswoboda's post “'Cause it's Khan Academy!”
  'Cause it's Khan Academy!
  (2 votes)
luckyducky
Posted 9 months ago. Direct link to luckyducky's post “what does this mean and c...”
what does this mean and can any one explain it differently??
(3 votes)
Answer
elimcanear
Posted 4 years ago. Direct link to elimcanear's post “does anyone know how to s...”
does anyone know how to switch ur avatar lol 😂😂😂
(3 votes)
Answer
keydin.sheperson
Posted a year ago. Direct link to keydin.sheperson's post “Why is handsom jack buyin...”
Why is handsom jack buying a pony made out of diamonds
(2 votes)
Answer
- celiajoswoboda
  Posted 4 months ago. Direct link to celiajoswoboda's post “Because then he could bra...”
  Because then he could brag to his friends about having something so expensive.
  (2 votes)
Cory Ballard
Posted 6 years ago. Direct link to Cory Ballard's post “How can you tell if an ex...”
How can you tell if an expression or equation is linear without graphing it?
(2 votes)
Answer
- Masahiro Arakawa
  Posted 6 years ago. Direct link to Masahiro Arakawa's post “An expression or equation...”
  An expression or equation (such as y equals a function of x) is linear if x is not raised to any power (or, equivalently, x is raised to the first power). The variable x can be multiplied by a scalar (such as 3x or -7.2x), and you can add a scalar to x (such as x + 4 or x - 0.6), and still be a linear function.
  
  If x is raised to a power higher than one, then the expression or equation is not linear.
  (1 vote)

Video transcript

Handsome Jack is buying a pony made of diamonds. The price of the pony is P dollars. And Jack also has to pay a 25% diamond pony tax. Match the expressions to their meaning for Handsome Jack. And they say multiple expressions may fit the same description. So in this bucket, we have the price of the diamond pony before tax. Well, they already tell us that the price of the diamond pony is P dollars. So that's P right over here. Now over here, they say the amount of tax Handsome Jack pays. Well, he pays a 25% diamond pony tax. So whatever the price is, he's going to pay 25% of that. Or another way of thinking about it, he's going to pay 25% is the same thing as 0.25. So 0.25 times P is the amount of tax he's going to pay on this diamond pony. Now, they say Handsome Jack's total bill for the diamond pony. Well, he's going to pay P for the pony plus 0.25P in taxes. So that is this one right over here. P for the pony plus 0.25P for the taxes. So that's that one over there. But if we look at this, you could view this literally as 1P plus 0.25P's. Well, that's the same thing as 1.25P. So that's the same thing as this right over here. So it's 1.25P. And these other three don't seem to fit in any of these categories. So I'm going to put it into the not used. We're required to categorize everything. So let me put this in the not used. It's falling off the screen, I realize. Let me put this in the not used. And then let me put this in the not used. Let's check our answer. We got it right.

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