Question 9 (5 points)
Sarina throws a ball up into the air, and it falls on the ground nearby. The ball's
height, in feet, is modeled by the function f(x) = -X2 - X+3, where x represents time
in seconds. What's the height of the ball when Sarina throws it?
CA) 4 feet
CB) 2 feet
C
C) 3 feet

d i think

step-by-step explanation:

step-by-step explanation:

what grade level is this? need to know so i can look in my old textbooks!

the answer would be d.

step-by-step explanation:

move all variables to the left side and all constants to the right side

(x−3)^2+(y−1)^2=16

this is the form of a circle. use this form to determine the center and radius of the circle.

( x − h ) 2 + ( y − k ) 2 = r 2

match the values in this circle to those of the standard form. the variable   r   represents the radius of the circle,   h   represents the x-offset from the origin, and   k   represents the y-offset from origin.

r = 4

h = 3

k = 1

the center of the circle is found at   ( h , k ) .

center:   ( 3 , 1 )

these values represent the important values for graphing and analyzing a circle.

center:   ( 3 , 1 ).

radius:   4

365

step-by-step explanation: