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Number and Quantity Videos 19 videos
Approximately 874 people per day wonder what a unit rate is. If you're one of them, check out our video on unit rates and how to use them. (We just...
This video covers how to use cross products to solve for a missing number in a proportion by setting that proportion with a variable over the produ...
GED Math 2.4 Rational Numbers. Lucius's favorite restaurant is how many km from his home?
SAT Math 6.4 Algebra and Functions 486 Views
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Description:
SAT Math 6.4 Algebra and Functions
Transcript
- 00:02
Here's your shmoop du jour...
- 00:04
A to the power of x + y times a to the power of x - y equals... what?
- 00:12
And here are the potential answers...
- 00:16
So this is just a SUPER simple question about exponent rules.
- 00:23
We are multiplying two exponents with the same base...
Full Transcript
- 00:27
which means we can just ADD our exponents.
- 00:29
Now if you didn't know that, oh are you screwed.
- 00:33
X + y + x - y equals... 2x.
- 00:38
So we have a to the power of 2x.
- 00:40
And... our answer's C.
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