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ACT Mathematics Videos 164 videos
ACT Math: Coordinate Geometry Drill 1, Problem 1. Which inequality is expressed by the number line?
ACT Math: Intermediate Algebra: Drill 3, Problem 1. Find the fifth number in the series.
ACT Math: Pre-Algebra Drill 1.2. What proportion of Jenna's day is spent Wii-swimming?
ACT Math 7.4 Pre-Algebra 348 Views
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Description:
ACT Math: Pre-Algebra Drill 7, Problem 4. Solve for x.
Transcript
- 00:03
Hello boys and girls it's Howdy Shmoopy time!
- 00:08
Solve for x: Absolute value of
- 00:10
X -1 over 2 equals -2
- 00:13
And here are the potential answers....
- 00:19
Okay, so what is question asking? Well it's an absolute value problem, yeah.
Full Transcript
- 00:23
These vertical line thingies that look like prison bars, except you're the one
- 00:28
forced to solve this problem. Those numbers are free to come and go as they please.
- 00:34
The trick to this question is just remembering that absolute value symbols
- 00:37
make everything inside them
- 00:39
positive. It means that we can just ignore the stuff inside the absolute value
- 00:43
things here.
- 00:43
And use good old common sense to realize that no x can ever make the left side equal -2
- 00:50
So the solution is that there's no solution.
- 00:53
Answer E. As in "Ex-con".
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