Between which two ordered pairs does the graph of f(x) =
x2 + x - 9 cross the negative x-axis?

A)(-6, 0) and (-5, 0)
B)(4,0) and (-3, 0)
C)(-3,0) and (-2, 0)
D)(-2, 0) and (-1,0)

It is A

Step-by-step explanation:

I did the Unit Review

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2