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The maximum recommended pulse rate R, when exercising, for a
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23 Dec 2013, 07:03
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The Official Guide For GMAT® Quantitative Review, 2ND EditionThe maximum recommended pulse rate R, when exercising, for a person who is x years of age is given by the equation R= 176 0.8x. What is the age, in years, of a person whose maximum recommended pulse rate when exercising is 140 ? (A) 40 (B) 45 (C) 50 (D) 55 (E) 60 Problem Solving Question: 1 Category: Algebra Substitution; Operations with rational numbers Page: 62 Difficulty: 500 GMAT Club is introducing a new project: The Official Guide For GMAT® Quantitative Review, 2ND Edition  Quantitative Questions ProjectEach week we'll be posting several questions from The Official Guide For GMAT® Quantitative Review, 2ND Edition and then after couple of days we'll provide Official Answer (OA) to them along with a slution. We'll be glad if you participate in development of this project: 1. Please provide your solutions to the questions; 2. Please vote for the best solutions by pressing Kudos button; 3. Please vote for the questions themselves by pressing Kudos button; 4. Please share your views on difficulty level of the questions, so that we have most precise evaluation. Thank you!
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Re: The maximum recommended pulse rate R, when exercising, for a
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23 Dec 2013, 07:04
SOLUTION:The maximum recommended pulse rate R, when exercising, for a person who is x years of age is given by the equation R= 176  0.8x. What is the age, in years, of a person whose maximum recommended pulse rate when exercising is 140 ?(A) 40 (B) 45 (C) 50 (D) 55 (E) 60 Substitute 140 for R: \(140 = 176  0.8x\) > \(\frac{4}{5}x=36\) > \(x=45\). Answer: B.
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Re: The maximum recommended pulse rate R, when exercising, for a
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23 Dec 2013, 12:31
What are we testing here..my multiplication skills?..
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Re: The maximum recommended pulse rate R, when exercising, for a
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23 Dec 2013, 17:30
45...is this really a 600 level problem?



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Re: The maximum recommended pulse rate R, when exercising, for a
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23 Dec 2013, 21:40
R=1760.8X; R> Maximum recommended pulse rate and X> Age
Substitute directly and solve: 0.8X=176140 = 36 X=36/0.8 => X = 45 (B) is the answer



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Re: The maximum recommended pulse rate R, when exercising, for a
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24 Dec 2013, 02:53
nutshell wrote: R=1760.8X; R> Maximum recommended pulse rate and X> Age
Substitute directly and solve: 0.8X=176140 = 36 X=36/0.8 => X = 45 (B) is the answer Method I:Given, R = 176  0.8x Thus, equating R as 140 and solving we get 140 = 176  0.8x or, 0.8x = 176  140 or, x = 360/8 or, x = 45 Method II:In every 10 years, pulse rate, R decreases by 8. Hence, R decreases by 36 (difference between 176 and 140), when x equals 10 times (36/8) or x= 45. Answer: Option (B)



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Re: The maximum recommended pulse rate R, when exercising, for a
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12 Feb 2017, 04:44
The question is a straightforward Formulas problem. We are initially given the formula i.e. the equation for Maximum Pulse Rate (R) in terms of age x. Further, we are supposed to find out the age for someone whose maximum pulse rate is 140. So now, for the equation R=176  0.8x, we substitute R=140 and solve for x. Hence, 140=1760.8x Therefore, 0.8x=36 Therefore, x=45.



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Re: The maximum recommended pulse rate R, when exercising, for a
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07 Jun 2017, 21:10
Plug in the given rate:
1) 140 = 176  .8x
Simplify (move the negative value to the left):
2) .8x = (176140)
To make calculations simpler, get rid of the decimal:
3) 8x = 360
Solve for x:
x = 45



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Re: The maximum recommended pulse rate R, when exercising, for a
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10 Jun 2017, 08:15
Bunuel wrote: The maximum recommended pulse rate R, when exercising, for a person who is x years of age is given by the equation R= 176 0.8x. What is the age, in years, of a person whose maximum recommended pulse rate when exercising is 140 ?
(A) 40 (B) 45 (C) 50 (D) 55 (E) 60
We are given that the maximum recommended pulse rate R, when exercising, for a person who is x years of age is given by the equation R = 176  0.8x. We need to determine the age of a person whose maximum recommended pulse rate when exercising is 140. 140 = 176  0.8x 0.8x = 36 x = 36/0.8 = 45 Answer: B
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Re: The maximum recommended pulse rate R, when exercising, for a
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22 Sep 2019, 17:38
140 = 176  0.8x >0.8x = (176140)>8x = 360(multiply by 10 on each side) > x=45.




Re: The maximum recommended pulse rate R, when exercising, for a
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