Question

The formula to change F to C is F equal 9/5 C + 32. If the temperature is 21.5 C what is it in F?

Answer 1

F=70.7

Explanation:

This is a simple substitution problem.

1. The formula to change Fahrenheit to Celsius is
   `F=(9)/(5)\left(C\right)+32`.
2. They give you C, so substitute it into the problem, which would give you
   `F=(9)/(5)\left(21.5\right)+32`.
3. Simplify the right side of the equation by multiplying
   `(9)/(5)` by 21.5.
4. Now, add 32 to 38.7, which should have been your answer to the previous step.
5. You should now have F= 70.7 as your answer.