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ACT Math: Elementary Algebra Drill 1, Problem 2. Can you simplify the expression?
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ACT Math 2.1 Coordinate Geometry 250 Views
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Description:
ACT Math: Coordinate Geometry Drill 2, Problem 1. The number line shows which expression?
- Coordinate Geometry / Number line graphs
- Product Type / ACT Math
- Foreign Language / Arabic Subtitled
- Foreign Language / Spanish Subtitled
- Foreign Language / Chinese Subtitled
- Foreign Language / Korean Subtitled
- Coordinate Geometry / The relations between equations and graphs
- Coordinate Geometry / Graphing inequalities
Transcript
- 00:02
Here's your shmoop du jour...
- 00:04
The number line shows which expression? And here are your potential answers...
- 00:10
OK, so we note 2 very important things right off the bat - there are open circles,
- 00:14
at the points negative 2 and positive 4.
- 00:17
Those open circles mean that the line can be greater
Full Transcript
- 00:20
than or less than but not equal to...
- 00:23
So right away we can see that A and C are going to be raccoon food.
- 00:28
Let's brute force the rest... we'll take a look at E and work our way up.
- 00:32
Here, x is GREATER than negative 4... but already we're in foul territory because the
- 00:36
line here doesn't connect or tie in with negative 4 at all...
- 00:39
...it just crosses over it... so we can quickly toss E. On to D.
- 00:44
Here x is bigger than negative 2... which also doesn't work.
- 00:47
The line shown is LOWER or more negative than negative 2, not bigger. So we can toss D.
- 00:54
Last chance is B... which ... works!
- 00:57
X is smaller or more negative than negative 2 and not equal to it here - check;
- 01:02
...and x is greater than but not equal to positive 4 here - check.
- 01:07
B is our answer. Done.
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