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If log (2x + 5) = 2, then x is equal to ______. - Mathematics

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Question

If log (2x + 5) = 2, then x is equal to ______.

Options

  • 40

  • 42.5

  • 47.5

  • 48

MCQ
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Solution

If log (2x + 5) = 2, then x is equal to 47.5.

Explanation:

102 = 2x + 5 

⇒ 100 = 2x + 5

⇒ 2x = 95

⇒ x = 47.5

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Chapter 7: Logarithms - Exercise 7C [Page 147]

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Nootan Mathematics [English] Class 9 ICSE
Chapter 7 Logarithms
Exercise 7C | Q 1. | Page 147
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