If the directrix of a parabola is the horizontal line y = 3, what is true of the parabola?
a)the focus is at (0, 3), and the equation for the parabola is y2 = 12x.
b)the focus is at (0, –3), and the equation for the parabola is x2 = –12y.
c)the focus is at (3, 0), and the equation for the parabola is x2 = 12y.
d)the focus is at (–3, 0), and the equation for the parabola is y2 = –12x.

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.

Adriveway is 40 yards long about how many meters long is it

Given: lines a and b are parallel and line c is a transversal. prove: 2 is supplementary to 8 what is the missing reason in the proof? statement reason 1. a || b, is a transv 1. given 2. ∠6 ≅ ∠2 2. ? 3. m∠6 = m∠2 3. def. of congruent 4. ∠6 is supp. to ∠8 4. def. of linear pair 5. ∠2 is supp. to ∠8 5. congruent supplements theorem corresponding angles theorem alternate interior angles theorem vertical angles theorem alternate exterior angles theorem