Adult giraffe weights are normally distributed, with a mean of 1,800 pounds and a standard deviation of 400 pounds. approximately what percentage of the adult giraffes weigh more than 2,200 pounds?
84.13%
8.41%
1.59%
15.87%

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?

Solve this 364x-64x=300x and 12(x2–x–1)+13(x2–x–1)=25(x2–x–1)

How are algebraic expressions evaluated using substitution?