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GMAT Error Log (Practice Exams) QUESTIONS AND ANSWERS 2021/2022 $9.99   Add to cart

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GMAT Error Log (Practice Exams) QUESTIONS AND ANSWERS 2021/2022

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GMAT Error Log (Practice Exams) Is x > 0? (1) |x + 3| = 4x - 3 (2) |x + 1| = 2x - 1 I assumed negative signs for the alternative answer for X (absolute value). Both of them being x = 0 for the alternative answers. Wasn't sure how to make sense of how to answer the question now I got...

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  • June 17, 2022
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  • 2021/2022
  • Exam (elaborations)
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GMAT Error Log (Practice Exams)
Is x > 0?

(1) |x + 3| = 4x - 3
(2) |x + 1| = 2x - 1

I assumed negative signs for the alternative answer for X (absolute value). Both of them being x = 0 for
the alternative answers. Wasn't sure how to make sense of how to answer the question now

I got ....
1) x = 2 or 0
2) x = 2 or 0

Couldn't decide between C, D and E since both pieces have 2 of the same answers.... Correct Answer: 1)
Absolute value equations can have 2 possible values
2) Set right side of the equation with + and then - to get two different answers.

3) TEST THE VARIABLES

5=5
3=-3

Therefore, x = 0 is not a valid solution and 2 is the only possible for solution. Stmt 1 sufficient. Do same
thing with stmt 2 and you get (D) both sufficient.

Why get wrong? cause I didn't know to test cases once you get your variables.

X intercept ? Correct Answer: When y value = 0 OR when line intercepts with the x axis

How to simplify exponents problems Correct Answer: You can split up what's inside the parenthesis and
distribute the exponent.

4^10 = 2^10x2^10

Probability Or vs And Correct Answer: or = + fractions
and = multiply fractions

How to make life easier with TONS of fractions in one problem Correct Answer: Multiply every fraction
by a common denominator to get whole numbers

How to simplify a fraction with a radical in it Correct Answer: Multiply both numerator and
denominator by something to get the number out of the radical

How to find what number to plug in to a given average Correct Answer: add up the total deviations
from the avg, then find the deviation that will make up for it.

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