F-1(x) = -5(x + 8) what is my domain?

can someone review my answer?

Mr. walker gave his class the function f(x) = (x + 3)(x + 5). four students made a claim about the function. each student’s claim is below. jeremiah: the y-intercept is at (15, 0). lindsay: the x-intercepts are at (–3, 0) and (5, 0). stephen: the vertex is at (–4, –1). alexis: the midpoint between the x-intercepts is at (4, 0). which student’s claim about the function is correct?

What is the average rate of change for this function for the interval from x=2 to x=4 ?

Empty box + box + empty box fill in the box is equal to 30 how