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ACT Math: Plane Geometry Drill 3, Problem 1. What is the area of the trapezoid shape in the video?
ACT Math Intermediate Algebra Drill 1, Problem 1. What is the product of (a – 3)2?
ACT Math Intermediate Algebra Drill 1, Problem 4. Solve for x based on the equation.
ACT Math 3.4 Intermediate Algebra 641 Views
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Description:
ACT Math: Intermediate Algebra Drill 3, Problem 4. Solve this system.
Transcript
- 00:03
To Shmoop or not to Shmoop...
- 00:05
That is not this question. That's not even the section. This is math...
- 00:08
...come on now. Alright solve this system 4x -3 y equals 12
- 00:13
X equal three-plus three fourths y
- 00:17
And here are the potential answers...
Full Transcript
- 00:20
Okay, so what is this question asking?
- 00:22
Well, it's another substitution problem like Equal
- 00:25
and Nutrasweet, but this one is a total trick question.
- 00:29
If we multiply the bottom equation by four...
- 00:38
...we get 4x equals twelve plus three y.
- 00:43
Subtract 3y from both sides and uh...look familiar?
- 00:47
Yeah they are totally the same equation twinsies.
- 00:50
So what does that mean? Well let's think about it. Whenever asked to find a
- 00:55
solution of two equations
- 00:57
we're really trying to find the point of intersection of the two lines
- 01:00
- 01:03
if the two given lines are exactly the same which they are in this case
- 01:08
that means they intersect each other everywhere
- 01:11
or at all real numbers. So the correct answer is D.
- 01:14
Too bad Mr. Smith would have given us a gold star. Sniff sniff.
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