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SAT Math Videos 171 videos
SAT Math 1.1 Algebra and Functions. Find an algebraic equation to correspond with the data.
SAT Math 1.1 Geometry and Measurement. What is the circumference of the circle?
SAT Math 1.1 Numbers and Operations. How many combinations of beverage and cereal can be made?
SAT Math 5.1 Numbers and Operations 274 Views
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SAT Math 5.1 Numbers and Operations
SAT Math 5.1 Numbers and Operations
Transcript
- 00:02
Here’s your shmoop du jour, brought to you by Line Segments.
- 00:05
For when you’re not hungry enough to eat an entire line.
- 00:09
The midpoint of AB is (1.5, 3). If A is (-0.5, 2), what is the x-coordinate of B?
- 00:21
Okay, so we’re asked to find the x-coordinate of the point that will create a line segment
- 00:26
whose midpoint is 1.5, 3.
Full Transcript
- 00:29
All right… first, it helps to graph out the information we do have.
- 00:34
Since we’re just concerned with finding the x-coordinate, we only need to focus on
- 00:38
the x-coordinates of the problem.
- 00:40
To go from the x-coordinate of point A to the x-coordinate of the midpoint,
- 00:45
we need to hop over 2 units to the right.
- 00:48
Since it's the MIDPOINT, we know point B must have an
- 00:51
x-coordinate another 2 units to the right of the midpoint.
- 00:56
We have 1.5 plus 2 is 3.5...
- 01:00
That's it. That's our answer. 3.5.
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