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Real Numbers and Quantities Videos 14 videos

Slope-Intercept Form
20451 Views

This video explains how to use slope-intercept form to graph a line or find an x value when you know the y value and the slope. Just remember rise...

Linear Equations in Standard Form
4987 Views

Apparently, Cinderella used mathematical strategies and the standard form of linear equations to get the prince's attention. The shoe was just the...

Solving Systems of Linear Equations
15823 Views

You can learn pretty much all there is to know about a linear equation by checking its relationship status. Just keep your fingers crossed that it...

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Using Units to Solve Problems 785 Views


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Transcript

00:00

using units to solve problems- a la shmoop.

00:07

alright if you walk into someplace in Paris and ask for three yards of

00:10

fabric well they'll probably look at you like you're nuts. [man asks McDonalds worker for fabric]

00:13

first of all because they don't sell fabric at McDonald's. but also because

00:16

they used a different funky unit of measurement over there. that's silly

00:20

metric system. well you'll run into problems all the

00:23

time where you have to convert from one unit to another when dealing with

00:26

distances or lengths or weights. you name it. by metric system think like kilograms

00:33

instead of pounds and meters instead of yards. well the good news is that you

00:40

don't have to have all those conversions memorized. your brain has enough stuff to

00:45

worry about. all you really have to do is refer to a conversion chart. where

00:49

someone's already done the dirty work for you, [kid with messy face holds conversion chart]

00:51

and shmoop has one and it looks a little something like this- though all right say

00:56

you want to know how many miles some guy walked and another guy shoes. but you're

01:01

told that he only traveled 9.65 six kilometers well we can look up miles to

01:07

kilometers on our handy dandy chart, or a chair and we see that one mile equals

01:12

about one point six oh nine kilometers. all right then we'll you can take nine

01:16

point six five six right there plug that into our calculator and divide by one [equation]

01:21

point six oh nine to get just about six miles exactly. see how cleverly you could

01:26

give that problem there for you no extra charge. okay so from there with

01:30

you whatever else particularly problem asks of us whether it's asking for a

01:34

rate or time or whatever. so chew on that while you're chewing on your little Big

01:40

Mac. [man gets McDonald's meal]

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