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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 ## The equation (M + 6)/36 = (p - 7)/21 relates two temperatu tagged by: Gmat_mission ##### This topic has 3 expert replies and 0 member replies ### Top Member ## The equation (M + 6)/36 = (p - 7)/21 relates two temperatu ## Timer 00:00 ## Your Answer A B C D E ## Global Stats Difficult The equation (M + 6)/36 = (p - 7)/21 relates two temperature scales, where M is the number of degrees on one scale and P is the number of degrees on the other scale. Which of the following equations can be used to convert temperatures from the P scale to the M scale? (A) M = (12/7)P + 13 (B) M = (12/7)P + 21 (C) M = (12/7)P - 12 (D) M = (12/7)P - 13 (E) M = (12/7)P - 18 OA=E Source: GMAT Paper Tests ### GMAT/MBA Expert GMAT Instructor Joined 22 Aug 2016 Posted: 1975 messages Followed by: 30 members Upvotes: 470 Gmat_mission wrote: The equation (M + 6)/36 = (P - 7)/21 relates two temperature scales, where M is the number of degrees on one scale and P is the number of degrees on the other scale. Which of the following equations can be used to convert temperatures from the P scale to the M scale? (A) M = (12/7)P + 13 (B) M = (12/7)P + 21 (C) M = (12/7)P - 12 (D) M = (12/7)P - 13 (E) M = (12/7)P - 18 OA=E Source: GMAT Paper Tests We are given (M + 6)/36 = (P - 7)/21 Multiplying each side by 3, we have 3*[(M + 6)/36 = (P - 7)/21] => (M + 6)/12 = (P - 7)/7 => 7M + 42 = 12P - 84 => 7M = 12P - 84 - 42 => 7M = 12P - 126 => M = (12/7)P - 126/7 => M = (12/7)P + 18 The correct answer: E Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GRE Manhattan | ACT Tutoring Houston | SAT Prep Courses Seattle | Charlotte IELTS Tutoring | and many more... Schedule your free consultation with an experienced GMAT Prep Advisor! Click here. ### GMAT/MBA Expert GMAT Instructor Joined 25 May 2010 Posted: 15344 messages Followed by: 1864 members Upvotes: 13060 GMAT Score: 790 Gmat_mission wrote: The equation (M + 6)/36 = (p - 7)/21 relates two temperature scales, where M is the number of degrees on one scale and P is the number of degrees on the other scale. Which of the following equations can be used to convert temperatures from the P scale to the M scale? (A) M = (12/7)P + 13 (B) M = (12/7)P + 21 (C) M = (12/7)P - 12 (D) M = (12/7)P - 13 (E) M = (12/7)P - 18 [/spoiler] Source: GMAT Paper Tests If M=30 and P=28, both sides of (M + 6)/36 = (P - 7)/21 are equal to 1. The correct answer must yield a valid equation for M=30 and P=28. When the question stem includes the phrase "which of the following," the correct answer is likely to be D or E. E: M = (12/7)P - 18 If M=30 and P=28, we get: 30 = (12/7)(28) - 18 30 = 48-18 30=30 Success! The correct answer is E. _________________ Mitch Hunt Private Tutor for the GMAT and GRE GMATGuruNY@gmail.com If you find one of my posts helpful, please take a moment to click on the "UPVOTE" icon. Available for tutoring in NYC and long-distance. For more information, please email me at GMATGuruNY@gmail.com. Student Review #1 Student Review #2 Student Review #3 Free GMAT Practice Test How can you improve your test score if you don't know your baseline score? Take a free online practice exam. Get started on achieving your dream score today! Sign up now. ### GMAT/MBA Expert GMAT Instructor Joined 25 Apr 2015 Posted: 2791 messages Followed by: 18 members Upvotes: 43 Gmat_mission wrote: The equation (M + 6)/36 = (p - 7)/21 relates two temperature scales, where M is the number of degrees on one scale and P is the number of degrees on the other scale. Which of the following equations can be used to convert temperatures from the P scale to the M scale? (A) M = (12/7)P + 13 (B) M = (12/7)P + 21 (C) M = (12/7)P - 12 (D) M = (12/7)P - 13 (E) M = (12/7)P - 18 OA=E Source: GMAT Paper Tests We need to isolate M: (M + 6)/36 = (P - 7)/21 21(M + 6) = 36(P - 7) 7(M + 6) = 12(P - 7) 7M + 42 = 12P - 84 7M = 12P - 126 M = (12/7)P - 18 Answer: E _________________ Scott Woodbury-Stewart Founder and CEO scott@targettestprep.com See why Target Test Prep is rated 5 out of 5 stars on BEAT the GMAT. Read our reviews • 5 Day FREE Trial Study Smarter, Not Harder Available with Beat the GMAT members only code • Free Trial & Practice Exam BEAT THE GMAT EXCLUSIVE 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 • Get 300+ Practice Questions 25 Video lessons and 6 Webinars for FREE 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 • Award-winning private GMAT tutoring Register now and save up to$200

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