The function f(x) = −x2 − 9x + 36 shows the relationship between the vertical distance of a diver from a pool's surface f(x), in feet, and the horizontal distance x, in feet, of a diver from the diving board. what is a zero of f(x), and what does it represent? x = 3; the diver jumps in the pool at 3 feet per second x = 3; the diver hits the water 3 feet away horizontally from the board x = 12; the diver hits the water 12 feet horizontally from the board x = 12; the diver jumps in the pool at 12 feet per second

Factor your polynomial to find the zero. When you factor that you get x values of -12 and 3. Because x is a horizontal value representing feet, x = 3 means that he hits the water 3 feet away horizontally from the board. He starts at 36 feet above the pool and has an upwards vertical velocity of 9 feet per second. Your answer, however, is the first choice above.

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.