To solve the expression XIV plus XV, we first need to convert these Roman numerals into their Arabic numeral equivalents. XIV represents the number 14, while XV represents the number 15.
Now, we add these two numbers together:
14 + 15 = 29
So, XIV plus XV equals XXIX in Roman numerals, which is 29 in Arabic numerals. This addition combines the numerical values represented by the Roman symbols, allowing us to find the total.