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Coordinates and Graphs Videos 64 videos
ACT Math: Coordinate Geometry Drill 1, Problem 1. Which inequality is expressed by the number line?
The video will show you how to plot points in 3D using the axes of the 3D coordinate system. Make sure you're wearing your special glasses for this...
When graphing inequalities, you graph the line, shade the corresponding side, and plug in the point. The end!
SAT Math 3.4 Numbers and Operations 198 Views
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Description:
SAT Math 3.4 Numbers and Operations
Transcript
- 00:02
And here's your shmoop du jour...
- 00:04
Marlene needs to fill a 4-gallon bucket with water from a drinking fountain.
- 00:08
Apparently, she started a fire that needs to be put out.
- 00:11
Marlene only has a jar that holds 1.5 cups.
- 00:14
How many trips will she need to make to the fountain?
Full Transcript
- 00:17
And here are the potential answers...
- 00:21
Let's break down what the question is asking.
- 00:23
It's asking us to find the number of trips Marlene needs to make...
- 00:27
...but to find that number, we have to know how many cups are in a gallon.
- 00:31
Listen up.
- 00:32
There are four cups to a quart and four quarts to a gallon.
- 00:36
That makes 16 cups in a gallon
- 00:39
and 64 cups in 4 gallons. If Marlene's teensy tiny jar can hold 1.5
- 00:46
cups, and she needs to get 4 gallons worth of water, or 64 cups,
- 00:51
how many trips will she need to make?
- 00:54
We divide 64 by 1.5, and we get 42.6666666...and so on.
- 01:00
Ok, so 42.66 of Marlene's jars will carry 64 cups of water.
- 01:07
If Marlene makes 42 trips, then she'll only have 63 cups of water.
- 01:12
To make sure she has those 64 cups, she has to round up... and make 43 trip.
- 01:18
Our answer is E.
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