Which of the following materials do cone bearing plants produce for reproduction? O spores and pollen
O flowers
O egg and sperm cells
O anther and stigma
Long

spores and pollen

Explanation:

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.

: -)

for 8 am not sure maybe yes?

for 9 if it is asking if the male is more or less it would be less

hope i even just a little : )