Consider the quadratic function: f(x) = -(x+4)(x-1) (I think I already got the answers for a, b, and c, but I wouldn't mind clarification, thank you!)

Step-by-step explanation:

okay I think you can solve this question

14.3

step-by-step explanation:

add all the numbers together.

9 + 12 + 15 + 16 + 17 + 17 = 86

now, divide 86 by how many numbers we have: 6.

86 / 6 = 14.3

you should talk someone who owns the website about it. you did not deserve to have all that hard work and time taken away. id watch videos of little puppies to cool you down, and maybe some nacho cheese doritos.