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An inequality that involves one absolute value has 2 cases to consider. Since this inequality has two absolute values, there are 3 cases to consider. I'll discuss why there are 3 cases below. Let a represent (3+2x) Let b represent (4-x) Now suppose |a| > |b| represents the original equation |3 + 2x|...
- by BarryLi
Sun Mar 13, 2011 12:56 pm- Forum: GMAT Math
- Topic: Absolute Inequality fundamentals
- Replies: 3
- Views: 1615
- by BarryLi
Sun Mar 13, 2011 12:03 pm- Forum: Problem Solving
- Topic: Silly question about inequalityy ... pls help
- Replies: 6
- Views: 1136
http://www.beatthegmat.com/700-50q-35v- ... 78259.html
Best of luck to you, get that post count up by posting topics and replying to topics as best as you can!
- by BarryLi
Fri Mar 11, 2011 3:35 pm- Forum: GMAT Strategy
- Topic: require advice about gmat math
- Replies: 3
- Views: 1771
I'll update when I get my AWA scores. It should be very interesting because in the conclusion I managed to include the motto from a popular 1980's American cartoon (G.I. Joe: "Knowing is half the battle").
- by BarryLi
Fri Mar 11, 2011 3:33 pm- Forum: I just Beat The GMAT!
- Topic: 700 (50Q 35V): I'll take it =)
- Replies: 4
- Views: 3224
700 (50Q 35V): I'll take it =)
I finished writing my GMAT exam less than an hour ago and I feel fantastic. A score equal to or greater than 700 was my target and I barely achieved it. I'm very grateful I found this forum to help me when I started studying one month ago. It helped me understand what resources were useful and which...
- by BarryLi
Fri Mar 11, 2011 3:32 pm- Forum: I just Beat The GMAT!
- Topic: 700 (50Q 35V): I'll take it =)
- Replies: 4
- Views: 3224
Attached should be "Nova MATH Review.pdf", a file that was posted on this site a few weeks ago. It covers all high school math, which is what is tested. As for the verbal part, I recommend getting your hands on an official GMAT guide. They contain over 800 past GMAT questions. Another grea...
- by BarryLi
Thu Mar 10, 2011 11:46 am- Forum: GMAT Strategy
- Topic: require advice about gmat math
- Replies: 3
- Views: 1771
- by BarryLi
Thu Mar 10, 2011 11:40 am- Forum: GMAT Strategy
- Topic: When do you see your GMAT CAT Score?
- Replies: 2
- Views: 1310
When do you see your GMAT CAT Score?
Is it instant, upon completing the verbal section of the test? I understand that the AWA needs to be marked by an e-reader as well as a human, therefore it will take more time.
- by BarryLi
Wed Mar 09, 2011 11:53 am- Forum: GMAT Strategy
- Topic: When do you see your GMAT CAT Score?
- Replies: 2
- Views: 1310
Excellent post sanju, thanks for clarifying that an answer given in less than 10 seconds is not deemed to a guess. Sometimes the questions are very short and simple.
- by BarryLi
Sun Mar 06, 2011 11:49 pm- Forum: Problem Solving
- Topic: Time crunched in Quantitative section
- Replies: 7
- Views: 1297
Best post I have seen in my month of lurking and posting here. Thank you so much for your post. I would buy you a beer if you were in my city, but since you're not I'll just have one on your behalf.
- by BarryLi
Sun Mar 06, 2011 11:46 pm- Forum: I just Beat The GMAT!
- Topic: "Few" words of advice after scoring 770 (Q51, V42)
- Replies: 23
- Views: 19782
Please elaborate on the concepts being used. In the xy-plane, does the line with equation y = 3x + 2 contain the point (r, s)? 1) (3r+2-s)(4r+9-s) = 0 2) (4r-6-s)(3r+2-s) = 0 It is not difficult to see that 3r+2-s has the same form of the line y=3x+2. What is the significance of 4r+9-s in (1), and ...
- by BarryLi
Sat Mar 05, 2011 1:59 am- Forum: Data Sufficiency
- Topic: Does this line contain the point (r, s)?
- Replies: 5
- Views: 2836
Does this line contain the point (r, s)?
Please elaborate on the concepts being used.
In the xy-plane, does the line with equation y = 3x + 2 contain the point (r, s)?
1) (3r+2-s)(4r+9-s) = 0
2) (4r-6-s)(3r+2-s) = 0
- by BarryLi
Fri Mar 04, 2011 2:59 pm- Forum: Data Sufficiency
- Topic: Does this line contain the point (r, s)?
- Replies: 5
- Views: 2836
Water: 22 m^3 / hour
Tank: 0.7 m^3 / hour
Water:Tank = 22:0.7 = 22/0.7:1 ~10*pi:1
Volume of cylinder: pi * radius^2 * height
10*pi = pi * radius^2 * 1
10 = radius^2
radius = sqrt(10)
[spoiler]OA: B[/spoiler]
- by BarryLi
Fri Mar 04, 2011 1:07 am- Forum: Problem Solving
- Topic: water at a rate of 22
- Replies: 2
- Views: 1006
2^(2x-1) = 8^y
2^(2x-1) = (2^y)(2^y)(2^y)
2^(2x-1) = 2^(3y)
2x-1 = 3y
2x = 3y+1
x = (3y+1) / 2
OA: B, although the character for 1/2 doesn't display correctly on my computer.
- by BarryLi
Fri Mar 04, 2011 1:02 am- Forum: Problem Solving
- Topic: 2^ (2 x - 1) = 8^y
- Replies: 3
- Views: 3444
2p/10?
I don't understand what " is, please elaborate if it is not a typo.
In any case, thanks for thinking of and posting original math problems every night!
- by BarryLi
Fri Mar 04, 2011 12:51 am- Forum: Data Sufficiency
- Topic: 2"/10 If p = r s t
- Replies: 3
- Views: 1428