Anumber decreased by -12 is 40. find the number.

Adaylily farm sells a portion of their daylilies and allows a portion to grow and divide. the recursive formula an=1.5(an-1)-100 represents the number of daylilies, a, after n years. after the fifth year, the farmers estimate they have 2225 daylilies. how many daylilies were on the farm after the first year?

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

How are algebraic expressions evaluated using substitution?