Live GMAT classes with Target Test Prep start Nov 21 and Nov 22. First class free.

See classes
Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

Newsweek Readers’ Choice Awards 2026 winner: Target Test Prep, #1 Test Prep

Target Test Prep was voted #1 Best Test Prep in the 2026 Newsweek Readers’ Choice™ Awards.

★★★★★5.0563 reviews
GMATLiveTeachStarts Nov 22
Josh Braslow, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Josh Braslow, 20+ years in test prep

Nov 22 · Josh Braslow
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes + 6 months of TTP OnDemand
  • Attend the first class for free
  • Every class is recorded, so you never fall behind
View classes & enroll
Limited seats availableTarget Test Prep
EALiveTeachOnDemandStart anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

EXECUTIVE ASSESSMENT

with

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll Start free 5-day trial
Limited cohort · enrollment openTrial includes full course accessTarget Test Prep
GMATOnDemandStart anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 563 reviewsTarget Test Prep

perimeter

Expert replies
Post new topic Post Reply
Subscribe topic
Previous Topic Next Topic
Legendary Member
Posts: 2326
Joined: Mon Jul 28, 2008 3:54 amFollowed by: 2 members
Thanked: 173 times
GMAT Score:710
by gmatmachoman » Thu May 27, 2010 9:22 pm
What is the perimeter of the triangle bounded by the line 8x – 15y = 120 and the x and y intercepts?


(1) 60 (2) 20 (3) 40 (4) 36

OA : 40
Last edited by gmatmachoman on Thu May 27, 2010 9:57 pm, edited 1 time in total.
Top
Join the discussion
Source: — Problem Solving |
User avatar
Master | Next Rank: 500 Posts
Posts: 392
Joined: Sun May 16, 2010 2:42 amFollowed by: 10 members
Location: Bangalore, India
Thanked: 116 times
GMAT Score:770

by albatross86 » Thu May 27, 2010 9:32 pm
I'm assuming the equation is 8x - 15y = 120

Plugging in x = 0 gives y = -8
Plugging in y = 0 gives x = 15

So x and y intercepts are (0,-8) and (15,0)
The third point is the origin (0,0)

This gives us lengths of 8, 15 and root(15^2 + 8^2) = 17

So perimeter is : 8 + 15 + 17 = 40

Pick (3)
Top
Join the discussion

GMAT/MBA Expert

GMAT Instructor
Posts: 1179
Joined: Sun Apr 11, 2010 9:07 pmFollowed by: 88 members
Location: Milpitas, CA
Thanked: 447 times

by Rahul@gurome » Thu May 27, 2010 9:37 pm
The coordinates of the triangle are (0, 0), (15, 0) and (0, -8)
Length between (15, 0) and (0, -8) is √(15)^2 + (-8)^2 = 17
Perimeter = 15 + 8 + 17 = 40

The correct answer is (3).
Rahul Lakhani
Quant Expert
Gurome, Inc.
https://www.GuroMe.com
On MBA sabbatical (at ISB) for 2011-12 - will stay active as time permits
1-800-566-4043 (USA)
+91-99201 32411 (India)
Top
Join the discussion
User avatar
Legendary Member
Posts: 1460
Joined: Tue Dec 29, 2009 1:28 amFollowed by: 7 members
Thanked: 135 times

by selango » Thu May 27, 2010 9:38 pm
The equation is 8x+15y=120

x intercept (ie)y=0 gives,x=15

y intercept (ie)x=0 gives ,y=-8

Distance is origin and x and y

Distance between 0 and x =15

Distance between 0 and y= 8

-->Third side = sqrt(225+64)=17

Perimeter =15+8+17=40
Top
Join the discussion
Legendary Member
Posts: 576
Joined: Sat Mar 13, 2010 8:31 pmFollowed by: 1 member
Thanked: 97 times

by liferocks » Thu May 27, 2010 9:39 pm
8x-15y=120

in intercept form it becomes

x/(15)+y/(-8)=1..so the sides of the triangle are 8,15,17

hence perimeter=8+15+17=40

Ans option3
“If you don't know where you are going, any road will get you there.”
Lewis Carroll
Top
Join the discussion