GEORGIA MATHEMATICS 1 - Carnegie Learning

Post-Test PAGE 414. What x-values do you think will be zeroes of the given quadratic equation?Use complete sentences to explain your reasoning.y 3.5(x 6)(x 6)Sample Answer: The solutions are 6 and –6, because when x = 6, then (x – 6) = 0 andzero multiplied by any number is zero. Likewise, when x = –6, then (x + 6) = 0 and zeromultiplied by any number is zero.15. What x-values do you think will be solutions to the given quadratic equation?Write your solutions in radical form if necessary. Use a complete sentence in your answer.x 2 115Sample Answer: The solutions to the equation are 115 and 115 .316. Find the zeroes of the quadratic function using the Quadratic Formula. Show all your work.y 8x 2 9x 1a 8, b 9, c 1x 992 4(8)(1)2(8) 94916 9 716So, the solutions are x 9 7 2 and x 9 7 16 .16 16 1 816 16 117. What does the value of the discriminant tell you about the number of solutions to aquadratic equation? Use complete sentences in your answer.Sample Answer: When the discriminant is positive, there are two solutions. When thediscriminant is zero, there is one solution. When the discriminant is negative, there areno solutions.© 2008 Carnegie Learning, Inc.18. Suppose that a ball is thrown straight up into the air from a height of 6 feet at an initialvelocity of 18 feet per second. Write a quadratic function that models the height of theball in terms of time using the vertical motion model y 16t 2 vt h.y 16t 2 18t 6232 Chapter 3 ■ Assessments Georgia Mathematics 1