The answer is f(X)= -2x^2 + 12x - 5, or the answer is best represented by the second option.
Because if you do, -b/2a, the result you'd get is three which represents the time of the ball after it's served.
Plug that number into the quadratic equation, and you should be getting thirteen as the result.
the answers are the second option and the fifth option, i took the alegbra nation and those were marked correct
180 / 12 = 15
15 • 12 = 180
12 inches in 1 foot, multiply by 15 to get total square inches which gives you 180. Can paint 180 square inches in 1 hour.