cards in a suit ( a suit of playing cards, i.e. there are 13 clubs, 13 hearts etc)
13 original united states colonies
Because the value of C equals 13
13+c = -39 c = -39-13 c = -52
13= Colonies in America
13
-13 degrees F equals -25 degrees C
7=c(s) obviously
17
4
16.5
6 + 12 - 5 = 13
13 = 7 + s(13 - 7) = (7-7) + s6 = s