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Answer 1

Answer:

It will read the same at F = -40.

Step-by-step explanation:

The relation between fahrenheit and celsius is given by the following equation:

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

At what temperature will a Fahrenheit thermometer read the same as a Celsius thermometer?

This is F for C = F. So

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

$F = \frac{5(F-32)}{9}$

$9F = 5F - 160$

$4F = -160$

$F = -\frac{160}{4}$

$F = -40$

It will read the same at F = -40.