If F = \(\frac{9}{5}\)C + 32, find C when F = 98.6

  • A 30
  • B 37
  • C 39
  • D 41
waec 2018mathematics

The correct answer is B. 37

F = \(\frac{9}{5}\)C + 32

When F = 98.6

98.6 = \(\frac{9}{5}\)C + 32

98.6 - 32 = \(\frac{9}{5}\)C

66.6= \(\frac{9}{5}\)C

66.6 x 5 = 9C

C = \(\frac{66.6 \times 5}{9}\)

= 37

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