The formula, F = (9/5)C + 32, is used to convert temperatures between degrees Celsius and Fahrenheit. Convert -4 degrees Fahrenheit to Celsius.
A. -64.8
B. 50.4
C. 15.56
D. -20
-4 = (9/5)C + 32 subtract 32 from both sides
-36 = (9/5)C multiply both sides by 5/9
-36 (5/9) = -20
+1982 
