A parabola and its focus are shown on the graph. The vertex of the parabola is at (0,0). On a coordinate plane, a parabola opens to the right. It has a vertex at (0, 0) and a focus (3, 0).

What is the equation of the directrix of the parabola?

y = 3
y = –3
x = 3
x = –3

Solve the system of equations. y= 2x y= x^2 - 15

Asix-sided die of unknown bias is rolled 20 times, and the number 3 comes up 6 times. in the next three rounds (the die is rolled 20 times in each round), the number 3 comes up 6 times, 5 times, and 7 times. the experimental probability of rolling a 3 is 10 %, which is approximately % more than its theoretical probability. (round off your answers to the nearest integer.)

In the figure below, segment ac is congruent to segment ab: which statement is used to prove that angle abd is congruent to angle acd? a.)triangle acd is similar to triangle abd. b.)triangle acd is congruent to triangle abd. c.)segment a.d. is congruent to segment ac. d.)segment a.d. is congruent to segment dc.