ShmoopTube
Where Monty Python meets your 10th grade teacher.
Search Thousands of Shmoop Videos
Coordinates and Graphs Videos 64 videos
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!
One formula to rule them all, one formula to find them. One formula to bring them all, and in the darkness bind them. Or something like that. I...
ACT Math 4.3 Intermediate Algebra 229 Views
Share It!
Description:
ACT Math: Intermediate Algebra Drill 4, Problem 3. Which equation has an x intercept at 1?
Transcript
- 00:03
Put this in your calculator and shmoop it...
- 00:05
Which equation has an x intercept at 1?
- 00:09
And here are the potential answers...
- 00:14
How do we solve this problem?
- 00:16
Well, we just plug in the point on the graph... so when the x intercept is 1, the y coordinate
Full Transcript
- 00:22
has to be 0... and we are at the point 1, 0.
- 00:26
We can just brute force the answer by plugging in for equation A, here:
- 00:36
We have 1 squared which is 1... minus 3, which is negative 2... then add 4 to get positive
- 00:40
2, which... doesn't fit.
- 00:43
So A is not the droid we're looking for.
- 00:46
Now B. We have 1 minus 2 plus 1, which is...0.
- 00:55
There we go -- don't even need to bother with the others.
- 00:57
B's our boy.
Related 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: Plane Geometry Drill 3, Problem 1. What is the area of the trapezoid shape in the video?
Haven't you always wondered how much cardboard it takes to encase a trunk warmer for your pet elephant?
Want to figure out the area and perimeter of irregular shapes? Break them down into regular shapes. For example, a flower can be broken down into s...