Search found 73 matches


Yes a) should be x^2 and not x alone, that was my mistake. thanks for that link to the explanation

by relaxin99

Mon Feb 23, 2009 3:09 pm
Forum: Problem Solving
Topic: Functions
Replies: 5
Views: 1186

Great explanation thank you :o

by relaxin99

Mon Feb 23, 2009 3:06 pm
Forum: Data Sufficiency
Topic: Divisible and Factors
Replies: 4
Views: 1147

Its from the gmat website, from one of their practice tests. The answer is, in fact, E

f(x) = -3x

can anyone elaborate on why this is correct

by relaxin99

Mon Feb 23, 2009 3:00 pm
Forum: Problem Solving
Topic: Functions
Replies: 5
Views: 1186

Great explanation, exponents are my weakness for sure

by relaxin99

Mon Feb 23, 2009 2:57 pm
Forum: Problem Solving
Topic: Exponents
Replies: 2
Views: 1044

bstalling wrote:D-35

(1/5)^m * (1/4)^18 = (1/2(10)^35)
5^(-1m) * 2^(-1*2*18) = 1/2(10^35)
5^(-1m) * 2^-36 = 1/2(10^35)
(2^-1)[5^(-1m) * 2^-35] = 1/2(10^35)
or
1/2(10^35)

I dont understand how you got down to the last two lilnes, everything else i completed understand

by relaxin99

Mon Feb 23, 2009 2:20 pm
Forum: Problem Solving
Topic: Exponents (dealing with fractions)
Replies: 3
Views: 829

Exponents

2^x - 2^ (x-2) = 3(2^13), what is the value of x?

9
11
13
15
17

by relaxin99

Mon Feb 23, 2009 1:27 pm
Forum: Problem Solving
Topic: Exponents
Replies: 2
Views: 1044

Divisible and Factors

Is teh integer r divisible by 3?

(1) r is the product of 4 consecutive positive integers
(2) r < 25

by relaxin99

Mon Feb 23, 2009 1:26 pm
Forum: Data Sufficiency
Topic: Divisible and Factors
Replies: 4
Views: 1147

Word Problem (Pay Rate)

Alices take home pay last year was the same each month, and she saved the same fraction of her take-home pay each month. The total amount of money that she had saved at the end of the year was 3 times the amount of that portion of her monthly take home pay that she did not save. If all the oney that...

by relaxin99

Mon Feb 23, 2009 1:24 pm
Forum: Problem Solving
Topic: Word Problem (Pay Rate)
Replies: 5
Views: 1079

Functions

For which of the following functions is f(a + b) = f(a) + f(b)
for all positive numbers a & b?

f(x) = x
f(x) = x +1
f(x) = sr X(square root of x)
f(x) = 2/x
f(x) = -3x

by relaxin99

Mon Feb 23, 2009 1:21 pm
Forum: Problem Solving
Topic: Functions
Replies: 5
Views: 1186

Sequence & Exponents

For every integer K from 1 to 10, inclusive, the kth term of a certain sequence is given by (-1)^ k + 1 * (1/2^k). If T is the sum of the first 10 terms in the sequence, then T is


greater than 2
between 1 and 2
between 1/2 and 1
between 1/4 and 1/2
less than 1/4

by relaxin99

Mon Feb 23, 2009 1:19 pm
Forum: Problem Solving
Topic: Sequence & Exponents
Replies: 2
Views: 2706
by relaxin99

Mon Feb 23, 2009 1:17 pm
Forum: Problem Solving
Topic: Exponents (dealing with fractions)
Replies: 3
Views: 829

GMAT PREP (Interest)

Last year a certain bond with a face value of 5000 yielded 8 percent of its face value in interest. If that interest was apporximately 6.5% of the bond's selling price, approximately what was the bond's selling price? A) 4063 B) 5325 C) 5351 D) 6000 E) 6154 Can someone please explain their answer as...

by relaxin99

Mon Feb 16, 2009 4:40 pm
Forum: Problem Solving
Topic: GMAT PREP (Interest)
Replies: 3
Views: 1439

GMAT PREP (Average speed & rate)

Susan drove at an average speed of 30 miles per hour for the first 30 miles of a trip and then at an average speed of 60 miles per hour for the remaining 30 miles of the trip. If she made no stops durign the trip, what was Susan's average speed, in miles per hour, for the entire trip? A) 35 B) 40 C)...

by relaxin99

Mon Feb 16, 2009 4:39 pm
Forum: Problem Solving
Topic: GMAT PREP (Average speed & rate)
Replies: 2
Views: 3971

GMAT PREP (Arithmetic Sequence)

In the arithmetic sequence t1, t2, t3......tn....., t1 = 23... tn = tn-1 - 3 for each n>1. What is the value of n when tn= -4

A) -1
B) 7
C) 10
D) 14
E) 20


Can someone please explain their answer as well, the correct answer is down below
























The answer is C

by relaxin99

Mon Feb 16, 2009 4:36 pm
Forum: Problem Solving
Topic: GMAT PREP (Arithmetic Sequence)
Replies: 2
Views: 790

GMAT PREP (Value of H?)

What is the value of h?

(1) h^2 = 36
(2) h^2 + 12h = -36




Can someone please explain their answer as well, the correct answer is down below
























The answer is B

by relaxin99

Mon Feb 16, 2009 4:34 pm
Forum: Data Sufficiency
Topic: GMAT PREP (Value of H?)
Replies: 3
Views: 3006