What is represented by R? How many are there?

r represents rockets, rooms, and righteousness

Explanation:

there are many things which r can represent, so depending on context, there r many rs

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)

if your own plato the answer is b. the fern transitioned from sporophyte generation to gametophyte generation.