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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 4.1 Intermediate Algebra 231 Views
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Description:
ACT Math Intermediate Algebra Drill 4, Problem 1. Which equation contains the point (1, 10)?
Transcript
- 00:03
We just might have a problem... that you'll understand...we all need shmoop...
- 00:11
Which equation contains the point (1, 10)?
- 00:13
And here are the potential answers...
- 00:18
OK so to find the equation that contains the point (1, 10)...
- 00:21
...we basically just have to plug in x as "1" into all of the answer choices to
Full Transcript
- 00:26
see which one is on the line of the actual equation.
- 00:36
Here we go... hold on to your... plugs...
- 00:50
2 times 1 squared plus 3 times 1 plus 2...
- 00:54
equals 2 plus 3 plus 2, or 7. And a 7, sadly... is not a 10.
- 01:04
1 squared plus 4 times 1 plus 3... equals 1 plus 4 plus 3, which equals 8... so we're
- 01:11
still lookin' for the princess who fits the shoe.
- 01:17
3 times 1 squared plus 4 times 1 plus 4... equals 3 plus 4 plus 4... or 11.
- 01:25
10 isn't even greater than 11, so that doesn't work.
- 01:30
On to D... 2 times 1 squared plus 5 times 1 plus 3... equals 2 plus 5 plus 3... or 10.
- 01:38
Bingo! D should be our answer! Just to check E... 2 times 1 squared plus 5
- 01:43
times 1 plus 6... equals 2 plus 5 plus 6...or 13. Nope.
- 01:48
D it is.
- 01:50
Okay -- you can let go of your plugs now.
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