Which expressions represent the model shown on the number line? Choose ALL the correct answers.
-9 +4
9+(-4)
9-4 or -9-4

Which graph represents an even function?

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

Aflower has 26 chromosomes. to create a new flower, how many chromosomes would a sperm cell have? what is this process called? part 2: within a flower cell that has 26 chromosomes, how many chromosomes would a cell that is created within the stem of a flower as it grows, have? what is this process called?