ShmoopTube
Where Monty Python meets your 10th grade teacher.
Search Thousands of Shmoop Videos
Playlist CAHSEE Math Test Prep: Algebra I 30 videos
CAHSEE Algebra I: Drill 1, Problem 1. What are some of the properties used to solve this equation?
CAHSEE Math Algebra I: Drill 1, Problem 2. Find the negative reciprocal.
CAHSEE Math 2.3 Algebra I 200 Views
Share It!
Description:
Algebra I Drill 2, Problem 3. Which of the following is the same as the expression?
Transcript
- 00:03
Here’s an unshmoopy question you’ll find on an exam somewhere in life.
- 00:08
Which of the following is the same as x plus 1 over 2… plus 3x over 5… equals 7/10?
- 00:15
And here are the potential answers…
- 00:21
So… what is this question asking?
- 00:24
Can we simplify? Ask Henry David Thoreau.
Full Transcript
- 00:30
The fact that the 2 and the 5 in the first two denominators can be multiplied
- 00:34
to get 10 should jump right out at us…
- 00:37
Ok, so let’s start multiplying the top and bottom of the first term by 5…
- 00:42
and we get 5x+5 over 10.
- 00:45
Then the next term top and bottom get multiplied by 2… and we get 6x over 10.
- 00:51
And finally… leave 7 over 10 as is. We’ve already got what we want on the bottom.
- 00:55
Now multiply both sides by 10 to eliminate the denominators altogether…
- 01:01
and we get 11x + 5 is 7.
- 01:04
Answer B.
- 01:05
As in, “Boxer shorts.”
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...