WAEC - Mathematics (2018 - No. 8)
If F = \(\frac{9}{5}\)C + 32, find C when F = 98.6
30
37
39
41
Uitleg
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