ShmoopTube
Where Monty Python meets your 10th grade teacher.
Search Thousands of Shmoop Videos
Word Problems Videos 32 videos
ACT Math: Elementary Algebra Drill 5, Problem 5. How much 10% solution must be added to yield the correct concentration?
SAT Math 2.3 Numbers and Operations. If Joaquin invests $500, how much will the investment be worth after 3 years?
CAHSEE Mathematical Reasoning: Drill 1, Problem 1. Based on this information, which of the following can be determined?
CAHSEE Math 1.5 Algebra and Functions 231 Views
Share It!
Description:
Algebra and Functions: Drill Set 1, Problem 5. Evaluate the expression.
Transcript
- 00:03
And here's another shmoop du jour.
- 00:05
Evaluate the expression 2ab - 3 times the square root of bc... for a = 9, b = 4, and c = 1.
- 00:14
Here are the potential answers...
- 00:16
Hit the pause button and try this thing first yourself.
- 00:20
So, this is just testing whether we can... plug. So... let's.
Full Transcript
- 00:27
If we take the base case equation here...
- 00:29
...and plug in the numbers as noted here...
- 00:31
...we get 2 times 9 times 4 minus 3 times the square root of 4 times 1.
- 00:38
Now let's simplify this mess.
- 00:40
2 times 9 is 18... times 4 is 72... minus 3 times the square root of 4... which is 2...
- 00:47
or 3 times 2, which is 6
- 00:50
So we have 72 minus 6 which is... the devil's number.
- 00:54
Or...D. As in devil.
- 00:55
It's okay. We'll get a priest in here to get this problem exorcised.
Related Videos
CAHSEE Math: Algebra and Functions Drill 5, Problem 3. Solve the equation.
We don't like knocking people down to size, but we do like simplifying radicals. Join us?
If fleeing criminals always fled the scene of the crime at perfect right angles, it would be much easier to determine their whereabouts. Fortunatel...
Okay, so this probably isn't going to help you master Pokemon Go, but game theory can be applied to all sorts of situations. Even stomping your old...