Combine each pair of sentences below into one sentence. Use a word or phrase that expresses the relationship shown in parentheses.A stamp's...

A word or phrase that expresses addition could be "also"
or "adds to" or "increases the value." So you could combine the given pair of sentences
and use the second sentence as an additional indication of value to what is stated in
the first sentence. Your combined sentence could read "A stamp's rarity affects its
value, and the way in which the perforations are made increases the value even more."
Another possibility could read "A stamp's rarity affects its value, and the way in which
the perforations are made also impacts the stamp's worth." Don't let the directions
scare you - combining the sentences is easy, and you will reflect the mathematical
process in the parentheses through the way in which the topics of the sentences relate
to each other.