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6(87.30 + 0.65) − 5(87.30) =

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Math Expert
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V
Joined: 02 Sep 2009
Posts: 49914
6(87.30 + 0.65) − 5(87.30) =  [#permalink]

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New post 30 Jul 2018, 00:07
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

84% (00:58) correct 16% (01:36) wrong based on 184 sessions

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Senior RC Moderator
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D
Status: Perfecting myself for GMAT
Joined: 22 May 2017
Posts: 757
Concentration: Nonprofit
Schools: Haas '21
GPA: 4
WE: Engineering (Computer Software)
Re: 6(87.30 + 0.65) − 5(87.30) =  [#permalink]

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New post 30 Jul 2018, 00:12
1
6(87.30+0.65)−5(87.30)

=> 6(87.30) + 6(0.65) - 5(87.30)

=> 6(87.30) - 5(87.30) + 6(0.65)

=> 87.30 + 3.9

=> 91.20

Hence option D
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Re: 6(87.30 + 0.65) − 5(87.30) =  [#permalink]

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New post 30 Jul 2018, 00:12
Bunuel wrote:
\(6(87.30 + 0.65) − 5(87.30) =\)

A. 3.90
B. 39.00
C. 90.90
D. 91.20
E. 91.85


NEW question from GMAT® Quantitative Review 2019


(PS03887)


OA: D
\(6(87.30 + 0.65) − 5(87.30) =(6-5)87.30 +6*0.65=87.30+ 3.90= 91.20\)
Director
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Joined: 31 Oct 2013
Posts: 647
Concentration: Accounting, Finance
GPA: 3.68
WE: Analyst (Accounting)
Re: 6(87.30 + 0.65) − 5(87.30) =  [#permalink]

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New post 30 Jul 2018, 04:05
1
Bunuel wrote:
\(6(87.30 + 0.65) − 5(87.30) =\)

A. 3.90
B. 39.00
C. 90.90
D. 91.20
E. 91.85


NEW question from GMAT® Quantitative Review 2019


(PS03887)



87.30 = x

= 6x + 6*0.65 -5x

= x + 3.90

= 87.30 + 3.90

= 91.20

The best answer is B.
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Re: 6(87.30 + 0.65) − 5(87.30) =  [#permalink]

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New post 10 Aug 2018, 18:50
Bunuel wrote:
\(6(87.30 + 0.65) − 5(87.30) =\)

A. 3.90
B. 39.00
C. 90.90
D. 91.20
E. 91.85


Because answer choices C, D, and E are so close to one another, we cannot use approximate values to solve this arithmetic problem. Expanding the first term and simplifying, we have:

6 x 87.30 + 6 x 0.65 - 5 x 87.30

6 x 87.30 - 5 x 87.30 + 6 x 0.65

87.30(6 - 5) + 3.9

87.3 + 3.9 = 91.2

Answer: D
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Re: 6(87.30 + 0.65) − 5(87.30) = &nbs [#permalink] 10 Aug 2018, 18:50
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