f(3) = 7(3)+9
f(3) = 21+9
f(3) = 30
本题已由中国数学会官方解答（现有会员：3人）
Answer:
Step-by-step explanation:
Set each factors equal to zero.
The x-int is
Answer: The answer is 8
What does it say.
I can't see the photo at all !
no
no because maynor rode 2 miles every 4 minutes and paul rode 3 miles every 4 minutes. not the same
