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Functions Videos 43 videos

Piecewise Functions
6147 Views

Don’t even think about starting up your combo lemonade/fro-yo stand without first making sure you understand piecewise functions. You’re just a...

Domain and Range
5378 Views

Domain and range: two terms you will learn to love (or hate with a vengeance). The domain is the set of all possible x values, and range is the set...

Functions as Models
730 Views

Functions briefly flirted with the idea of being infomercial hosts, but they didn’t shine when talking on-camera. They’re much better off in th...

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CAHSEE Math 5.5 Algebra and Functions 266 Views


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Description:

Algebra and Functions: Drill Set 5, Problem 5. Solve the equation.

Language:
English Language

Transcript

00:03

And here's your shmoop du jour.

00:05

Solve the equation 9x - 18 = 72 for x.

00:10

And here are the potential answers...

00:12

Before we spoil the ending, hit pause and try to solve it yourself.

00:16

This is a straightforward algebra problem that we can solve in two steps.

00:20

Get x on one side by adding 18 to both sides...

00:23

...and we get 9x = 90. Next, get x all by itself...

00:28

...by dividing both sides by 9.

00:31

90 divided by 9 is 10 and voila...

00:33

...the answer is D.

00:35

That didn't take long.

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