• NEW! FREE Beat The GMAT Quizzes
Hundreds of Questions Highly Detailed Reporting Expert Explanations
• 7 CATs FREE!
If you earn 100 Forum Points

Engage in the Beat The GMAT forums to earn
100 points for $49 worth of Veritas practice GMATs FREE VERITAS PRACTICE GMAT EXAMS Earn 10 Points Per Post Earn 10 Points Per Thanks Earn 10 Points Per Upvote ## A telephone company charges x cents for the tagged by: BTGmoderatorRO ##### This topic has 2 expert replies and 0 member replies ## A telephone company charges x cents for the A telephone company charges x cents for the first minute of a call and charges for any additional time at the rate of y cents per minute. If a certain call costs$5.55 and lasts more than 1 minute, which of the following expressions represents the length of that call, in minutes?

(A) $$\frac{555-x}{y}$$

(B) $$\frac{555+x-y}{y}$$

(C) $$\frac{555-x+y}{y}$$

(D) $$\frac{555-x-y}{y}$$

(E) $$\frac{555}{x+y}$$

OA is C
How do I tackle this question? I need a simple approach method from an Expert, please. Thanks in anticipation

### GMAT/MBA Expert

GMAT Instructor
Joined
04 Oct 2017
Posted:
551 messages
Followed by:
11 members
180
Roland2rule wrote:
A telephone company charges x cents for the first minute of a call and charges for any additional time at the rate of y cents per minute. If a certain call costs $5.55 and lasts more than 1 minute, which of the following expressions represents the length of that call, in minutes? (A) $$\frac{555-x}{y}$$ (B) $$\frac{555+x-y}{y}$$ (C) $$\frac{555-x+y}{y}$$ (D) $$\frac{555-x-y}{y}$$ (E) $$\frac{555}{x+y}$$ OA is C How do I tackle this question? I need a simple approach method from an Expert, please. Thanks in anticipation Hello Roland. Let's take a look. Let's suppose that the call lasts t minutes. Now, let's write$5.55 as 555 cents, then

for the first minute = x cents.

for the rest of the call = y(t-1).

Hence, $555 cents = x+y(t-1). This implies $$x+y\left(t-1\right)=555\ \Leftrightarrow\ \ \ yt-y=555-x\ \Leftrightarrow\ \ yt=555-x+y\ \Leftrightarrow\ \ t\ =\ \frac{555-x+y}{y}.$$ This is why the correct answer is the option C. I hope it helps. I'm available if you'd like a follow-up. _________________ GMAT Prep From The Economist We offer 70+ point score improvement money back guarantee. Our average student improves 98 points. Free 7-Day Test Prep with Economist GMAT Tutor - Receive free access to the top-rated GMAT prep course including a 1-on-1 strategy session, 2 full-length tests, and 5 ask-a-tutor messages. Get started now. ### GMAT/MBA Expert GMAT Instructor Joined 09 Apr 2015 Posted: 1461 messages Followed by: 18 members Upvotes: 39 Roland2rule wrote: A telephone company charges x cents for the first minute of a call and charges for any additional time at the rate of y cents per minute. If a certain call costs$5.55 and lasts more than 1 minute, which of the following expressions represents the length of that call, in minutes?

(A) $$\frac{555-x}{y}$$

(B) $$\frac{555+x-y}{y}$$

(C) $$\frac{555-x+y}{y}$$

(D) $$\frac{555-x-y}{y}$$

(E) $$\frac{555}{x+y}$$
Since x and y are in cents, we should start by expressing $5.55 in cents, which is 555 cents. We can then create the following equation where t = the length of the call in minutes: 555 = x + y(t - 1) 555 - x = yt - y 555 - x + y = yt (555 - x + y)/y = t Answer: C _________________ Jeffrey Miller Head of GMAT Instruction jeff@targettestprep.com See why Target Test Prep is rated 5 out of 5 stars on BEAT the GMAT. Read our reviews • Free Veritas GMAT Class Experience Lesson 1 Live Free Available with Beat the GMAT members only code • Get 300+ Practice Questions 25 Video lessons and 6 Webinars for FREE Available with Beat the GMAT members only code • Free Trial & Practice Exam BEAT THE GMAT EXCLUSIVE Available with Beat the GMAT members only code • Award-winning private GMAT tutoring Register now and save up to$200

Available with Beat the GMAT members only code

• Magoosh
Study with Magoosh GMAT prep

Available with Beat the GMAT members only code

• 1 Hour Free
BEAT THE GMAT EXCLUSIVE

Available with Beat the GMAT members only code

• 5 Day FREE Trial
Study Smarter, Not Harder

Available with Beat the GMAT members only code

• 5-Day Free Trial
5-day free, full-access trial TTP Quant

Available with Beat the GMAT members only code

• FREE GMAT Exam
Know how you'd score today for \$0

Available with Beat the GMAT members only code

• Free Practice Test & Review
How would you score if you took the GMAT

Available with Beat the GMAT members only code

### Top First Responders*

1 Jay@ManhattanReview 74 first replies
2 Brent@GMATPrepNow 66 first replies
3 GMATGuruNY 40 first replies
4 Ian Stewart 25 first replies
5 Scott@TargetTestPrep 15 first replies
* Only counts replies to topics started in last 30 days
See More Top Beat The GMAT Members

### Most Active Experts

1 Scott@TargetTestPrep

Target Test Prep

200 posts
2 Max@Math Revolution

Math Revolution

93 posts
3 Brent@GMATPrepNow

GMAT Prep Now Teacher

91 posts
4 Jay@ManhattanReview

Manhattan Review

81 posts
5 GMATGuruNY

The Princeton Review Teacher

61 posts
See More Top Beat The GMAT Experts