If (4 – x)/(2 + x) = x, what is the value of x^2 + 3x -4
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: We start by simplifying the given equation, (4-x)/(2+x) = x. We first multiply both sides by 2+x. Thus we have: 4 – x = …
Author: Scott Woodbury-Stewart
If the operation @ is defined by x@y=(xy)^1/2 for all …
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: We are given that the operation ⊙ is defined by x⊙y = √(xy) for all positive numbers. We are next given that (5⊙45)⊙60. Following …
David has d books, which is 3 times as many as Jeff…
May 21, 2015
GMAT OFFICIAL GUIDE PS – Solution: Although we could plug in a real value for d, the problem can be just as easily solved by setting up equations. So …
The ratio of the length to the width of a rectangular advertising…
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: Let’s first set up our ratio using variable multipliers. length : width = 3.3x : 2x We are given that the width is 8 …
According to the chart shown, which of the following is…
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: An easy way to determine which data value is the median is to take the total number of shipments, add 1, and then divide …
For the positive numbers, n, n + 1, n + 2, n + 4, and n + 8
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: Let’s first calculate the mean (arithmetic average). mean = sum/quantity mean = (n + n + 1 + n + 2 + n + …
If x(2x + 1) = 0 and (x + 1/2)(2x – 3) = 0, then x =
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: To solve we will use the zero product property. The zero product property states that if the product of two quantities is equal to …
1/2 + [(2/3 * 3/8)/4] – 9/16 =
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: We need to simplify the expression using PEMDAS. Parentheses Exponents Multiplication and Division Addition and Subtraction The calculation of an equation or expression must …