A planetary body moves along a path modeled by the function f(x) = -x2 + 3x - 15. This path is laid over a coordinate grid so that astronomers can identify when the planet will come in contact with
another path represented by the x-axis. At what point(s) will the paths cross?

you probably already have the answer but anyways it's b. 15.0

step-by-step explanation:

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb