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555-605 (Medium)|   Algebra|   Arithmetic|      
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What is the value of 5x^2 − 1.9x − 3.7 for x = − 0.3? 25 Aug 2016, 01:33
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D
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70% (01:50) correct 30% (01:58) wrong based on 319 sessions

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What is the value of 5x^2 − 1.9x − 3.7 for x = − 0.3?

A. −4.72
B. −3.82
C. −3.58
D. −2.68
E. 0.57
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D
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What is the value of 5x^2 − 1.9x − 3.7 for x = − 0.3? Updated on: 25 Aug 2016, 12:49
Originally posted by Harish Yannam on 25 Aug 2016, 08:25.
Last edited by Harish Yannam on 25 Aug 2016, 12:49, edited 1 time in total.
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5*0.09 - 1.9 *0.3 - 3.7 = 0.45-0.57-3.7 =-3.82
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What is the value of 5x^2 − 1.9x − 3.7 for x = − 0.3? 25 Aug 2016, 09:08
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Harish Yannam
5*0.09 - 1.9 *3 - 3.7 = 0.45-0.57-3.7 =-3.82
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Answer will be D-please check
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What is the value of 5x^2 − 1.9x − 3.7 for x = − 0.3? 25 Aug 2016, 10:10
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Harish Yannam
5*0.09 - 1.9 *3 - 3.7 = 0.45-0.57-3.7 =-3.82
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Your mistake is highlighted above.

X is -0.3 and not 3.
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What is the value of 5x^2 − 1.9x − 3.7 for x = − 0.3? 25 Aug 2016, 12:51
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Harish Yannam
5*0.09 - 1.9 *3 - 3.7 = 0.45-0.57-3.7 =-3.82

Your mistake is highlighted above.

X is -0.3 and not 3.
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thank you!! edited... answer ?
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What is the value of 5x^2 − 1.9x − 3.7 for x = − 0.3? 25 Aug 2016, 14:46
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5x^2 - 1.9x - 3.7, x =-0.3

Firstly, 5x^2 can be written as 5 * x * x - substituting one of the x with -0.3

We have -1.5x - 1.9x -3.7 ---> -3.4x-3.7 ---> -3.4 (-0.3) -3.7 ---> 1.02 - 3.7 = -2.68
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What is the value of 5x^2 − 1.9x − 3.7 for x = − 0.3? 27 Aug 2016, 01:31
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Harish Yannam
abhimahna
Harish Yannam
5*0.09 - 1.9 *3 - 3.7 = 0.45-0.57-3.7 =-3.82

Your mistake is highlighted above.

X is -0.3 and not 3.


thank you!! edited... answer ?
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Answer is D. Solve it yourself once and verify.
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What is the value of 5x^2 − 1.9x − 3.7 for x = − 0.3? 28 Aug 2016, 06:34
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5*0.09 - 1.9*-0.3 - 3.7 = 0.45 - 0.57 - 3.7

= -0.12 - 3.7 = -3.82
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What is the value of 5x^2 − 1.9x − 3.7 for x = − 0.3? 28 Aug 2016, 07:07
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5*0.09 - 1.9*(-0.3)-3.7 = 5*0.1 - 2*(-0.3) - 3.7= 0.5+0.6-3.7=1.1-3.7= -2.6(approx)

Answer D
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What is the value of 5x^2 − 1.9x − 3.7 for x = − 0.3? 04 Jun 2017, 09:27
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We have

\(5 * \frac{3}{10}^2 - \frac{19}{10} * -\frac{3}{10} - \frac{37}{10} = 5*\frac{9}{100} + \frac{19}{10} * \frac{3}{10} - \frac{37}{10} = \frac{45}{100} + \frac{57}{100} - \frac{370}{100} = \frac{102}{100} - \frac{370}{100} = -\frac{268}{100} = - 2.68\)

Option D

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What is the value of 5x^2 − 1.9x − 3.7 for x = − 0.3? 04 Jun 2017, 09:33
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Bunuel
What is the value of 5x^2 − 1.9x − 3.7 for x = − 0.3?

A. −4.72
B. −3.82
C. −3.58
D. −2.68
E. 0.57
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\(5x^2 − 1.9x − 3.7\)

Or, \(x (5x − 1.9) − 3.7\)

Or, \(− 0.3 (5*− 0.3 − 1.9) − 3.7\)

Or, \(− 0.3 (− 1.5 − 1.9) − 3.7\)

Or, \(− 0.3*−3.4 − 3.7\)

Or, \(− 0.3*−3.4 − 3.7\)

Or, \(1.02 − 3.7\)

Or, \(−2.68\)

Hence, answer will be (D)...
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What is the value of 5x^2 − 1.9x − 3.7 for x = − 0.3? 24 Jun 2022, 04:32
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