+18 The formula F=9/5+32 can be used to convert temperatures between degrees Fahrenheit (F) and degrees Celsius (C). What Celsius temperature C has the same value when converted to a Fahrenheit F temperature ?
+36919 Well, it is common knowledge that -40 F = - 40 C Substitute into the equation to prove it to yourself !
+36919 Uhhh.... I gave it to you -40 F = -40 C
AND the formula is F = 9/5 C + 32 ( you left out the 'C')
+36919 You're welcome..... I've been in some winter weather a few times when it was -40 .....pretty 'cool' ! Haha
