If x = 2t and y = t/3, what is the value of x^2 – y^2
May 19, 2016
GMAT OFFICIAL GUIDE DS Solution: Since x = 2t and y = t/3, by substitution, we have x^2 – y^2 (2t)^2 – (t/3)^2 4t^2 – t^2/9 (36t^2)/9 – t^2/9 …
Author: Scott Woodbury-Stewart
The total cost for Company X to produce a batch of tools is $10,000 plus…
May 17, 2016
GMAT OFFICIAL GUIDE PS Solution: We know the relationship between profit, revenue and cost is: profit = revenue – cost or P = R – C (the relationship is actually …
In a certain sequence of 8 numbers, each number after the first…
May 17, 2016
GMAT OFFICIAL GUIDE PS Solution: Since each number in the 8-number sequence after the first is 1 more than the previous number and the first number is -5, the sequence …
In the xy-plane, the straight-line graphs of the three equations above…
May 16, 2016
GMAT OFFICIAL GUIDE DS Solution: We can begin by substituting p and r in for x and y, respectively, in the 3 given equations. 1) r = ap – …
In planning for a trip, Joan estimated both the distance of the trip
May 16, 2016
GMAT OFFICIAL GUIDE DS Solution: We are given that Joan accurately divided her estimated distance by her estimated average speed to obtain an estimate for the time, in hours, …
The figure above represents an L-shaped garden…
May 16, 2016
GMAT OFFICIAL GUIDE DS Solution: We are given a diagram of an L-shaped garden. Let’s sketch that diagram below. We see that the L-shaped garden can be broken up …
On a certain nonstop trip, Marta averaged x miles per hour for…
May 16, 2016
GMAT OFFICIAL GUIDE DS Solution: We are given that Marta averaged x miles per hour for 2 hours and y miles per hour for the remaining 3 hours. Since …
Did the sum of the prices of three shirts…
May 16, 2016
GMAT OFFICIAL GUIDE DS Solution: We must determine whether the price of 3 shirts exceeded $60. Statement One Alone: The price of the most expensive of the shirts exceeded …