The number 6 is halfway between 2.8 and what?

( 2.8 + x )/2 = 6
1.4 + x/2 = 6
x = 6 - 1.4 = 4.6
= 4.6 * 2
= 9.2

Syllable added to a root word to change its meaning : affixan independent word--example run,walk,book : free morphemeaffix that gives grammatical meaning such as tense or number : inflectiona word part that must attach to a word in order to be usable : bound morphemedegree of comparison formed by adding -er or more to an adjective : comparativedegree of comparison formed by adding -est or most to an adjective : superlativeaffix added to the beginning of a word : prefixaffix added to the end of a word : suffixroot word of lovable : lovetwo roots used together to form one word : combining form