Help! Isn’t true or false?

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?

If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (cxd)(x)

The variable in a relation who’s value depends on the value of the independent variable is called what?