Terri

You have no results submitted as of Monday, March 7 for the "Working With Quadratics" assignment on Study Island. This was due last week!!! Please finish the assignment on study island and then see me ASAP so I can post your results!


 * || **Report:** || **All Questions
 * **Program:** || **Algebra II**  ||
 * **Test:** || **Working With Quadratics**  ||
 * **User:** || **Werner, Terri**  ||
 * **Session Date:** || **03/08/11 - 9:09 AM CST**  ||
 * **% Correct:** || **(20/33) 60.6%**  ||
 * **Correct Questions:** || **20**  ||
 * **Missed Questions:** || **13**  || ||
 * **Missed Questions:** || **13**  || ||


 * View Missed | View Correct | View All ||
 * || ||  || 2x2 - 2x = -3
 * || ||  || 2x2 - 2x = -3

Will the graph of the equation above intersect the x-axis in zero, one, or two points?

(//Use the quadratic formula to help you answer this question.//) || ||


 * || || || **A.** || There is not enough information. || ||
 * || || || **B.** || one || ||
 * || Answered Correct: || || || **C.** || zero || ||
 * || || || **D.** || two || ||

|| ||  || y = x2 + 8x + 7 What are the x-intercepts of the graph of the equation above? || ||


 * || || || **A.** || (1, 0) and (7, 0) || ||
 * || || || **B.** || (1, 0) and (-7, 0) || ||
 * || || || **C.** || (-1, 0) and (7, 0) || ||
 * || Answered Correct: || || || **D.** || (-1, 0) and (-7, 0) || ||

|| ||  || A quadratic equation is written in 4 equivalent forms below. # y = (x + 5)2 - 9
 * 1) y = x2 + 10x + 16
 * 2) y = (x + 2)(x + 8)
 * 3) y = x(x + 10) + 16

Which of the forms shown above would be the most useful if attempting to find the x-intercepts of the quadratic equation? || ||


 * || Answered Incorrect: || || || **A.** || IV. || ||
 * || || || **B.** || II. || ||
 * || || || **C.** || I. || ||
 * || Correct Answer: || || || **D.** || III. || ||

|| ||  || 18x + 6 = -4x2 Will the graph of the equation above intersect the x-axis in zero, one, or two points?

(//Use the quadratic formula to help you answer this question.//) || ||


 * || || || **A.** || zero || ||
 * || || || **B.** || There is not enough information. || ||
 * || Answered Correct: || || || **C.** || two || ||
 * || || || **D.** || one || ||

|| ||  || A kicker kicks a football during practice. The equation below can be used to find the height (//h//) in feet of the football after //t// seconds. //h//(//t//) = -16//t//2 + 16//t// After how many seconds will the ball hit the ground? || ||


 * || Answered Incorrect: || || || **A.** || 3 || ||
 * || Correct Answer: || || || **B.** || 1 || ||
 * || || || **C.** || 16 || ||
 * || || || **D.** || 2 || ||

|| ||  || In which direction must the graph of f(x) = x2 be shifted to produce the graph of g(x) = x2 - 8? || ||


 * || Correct Answer: || || || **A.** || down || ||
 * || || || **B.** || right || ||
 * || Answered Incorrect: || || || **C.** || up || ||
 * || || || **D.** || left || ||

|| ||  || A quadratic equation is written in 4 equivalent forms below. # y = (x + 5)2 - 9
 * 1) y = x2 + 10x + 16
 * 2) y = (x + 2)(x + 8)
 * 3) y = x(x + 10) + 16

Which of the forms shown above would be the most useful if attempting to find the vertex of the quadratic equation? || ||


 * || Correct Answer: || || || **A.** || I. || ||
 * || Answered Incorrect: || || || **B.** || III. || ||
 * || || || **C.** || II. || ||
 * || || || **D.** || IV. || ||

|| ||  || Annalise, Torah, and Samantha are cousins. Annalise is 1 year older than Torah, and Samantha is 3 years older than Annalise. If the product of Annalise's and Samantha's ages is 180, how old is Annalise? || ||


 * || || || **A.** || 11 || ||
 * || || || **B.** || 23 || ||
 * || Answered Incorrect: || || || **C.** || 15 || ||
 * || Correct Answer: || || || **D.** || 12 || ||

|| ||  || Dale is 2 years older than Chip. The product of their ages is 360. How old is Dale? || ||


 * || Answered Incorrect: || || || **A.** || 18 || ||
 * || || || **B.** || 22 || ||
 * || || || **C.** || 16 || ||
 * || Correct Answer: || || || **D.** || 20 || ||

|| ||  || y = 5x2 + 9x + 8 Will the parabola of this equation open upward or downward? || ||


 * || Answered Correct: || || || **A.** || upward || ||
 * || || || **B.** || downward || ||
 * || || || **C.** || There is not enough information. || ||

|| ||  || If the graph of f(x) = x2 is shifted 2 units to the left, then what would be the equation of the new graph? || ||


 * || || || **A.** || g(x) = (x - 2)2 || ||
 * || Answered Correct: || || || **B.** || g(x) = (x + 2)2 || ||
 * || || || **C.** || g(x) = x2 - 2 || ||
 * || || || **D.** || g(x) = x2 + 2 || ||

|| ||  || If the graph of f(x) = x2 is shifted up 2 units, then what would be the equation of the new graph? || ||


 * || || || **A.** || g(x) = (x - 2)2 || ||
 * || Answered Correct: || || || **B.** || g(x) = x2 + 2 || ||
 * || || || **C.** || g(x) = (x + 2)2 || ||
 * || || || **D.** || g(x) = x2 - 2 || ||

|| ||  || Clay built a dog pen based on the diagram below. The diagram is not drawn to scale.


 * || A = 55 m2 || || //x// - 4 ||
 * //x// + 2 ||  ||

What are the dimensions of the dog pen? || ||


 * || || || **A.** || 55 m by 1 m || ||
 * || || || **B.** || 9 m by 7 m || ||
 * || Answered Correct: || || || **C.** || 11 m by 5 m || ||
 * || || || **D.** || 2 m by 4 m || ||

|| ||  || 1x2 + 2x = -1 Will the graph of the equation above intersect the x-axis in zero, one, or two points?

(//Use the quadratic formula to help you answer this question.//) || ||


 * || || || **A.** || two || ||
 * || || || **B.** || zero || ||
 * || || || **C.** || There is not enough information. || ||
 * || Answered Correct: || || || **D.** || one || ||

|| ||  || y = x2 + 1x - 12 What are the x-intercepts of the graph of the equation above? || ||


 * || || || **A.** || (-4, 0) and (-3, 0) || ||
 * || Answered Incorrect: || || || **B.** || (4, 0) and (-3, 0) || ||
 * || || || **C.** || (4, 0) and (3, 0) || ||
 * || Correct Answer: || || || **D.** || (-4, 0) and (3, 0) || ||

|| ||  || If the graph of the function y = x2 was to be reflected across the x-axis, what equation would correctly describe the new function? || ||


 * || || || **A.** || y = [[image:http://www86.studyisland.com/userfiles/sqrt.gif]]x || ||
 * || || || **B.** || y = x-2 || ||
 * || Answered Incorrect: || || || **C.** || y = x2 - 1 || ||
 * || Correct Answer: || || || **D.** || y = -x2 || ||

|| ||  || y = x2 - 6x - 16 Which of the following tables matches the equation shown above? || || **x** || **y** ||
 * 2 || -24 ||
 * 3 || -25 ||
 * 4 || -24 ||
 * 5 || 11 || ||  || || **x** || **y** ||
 * 2 || -9 ||
 * 3 || -25 ||
 * 4 || -9 ||
 * 5 || -21 || ||  || || **x** || **y** ||
 * 2 || -22 ||
 * 3 || -28 ||
 * 4 || -22 ||
 * 5 || -21 || ||  || || **x** || **y** ||
 * 2 || -24 ||
 * 3 || -25 ||
 * 4 || -24 ||
 * 5 || -21 || ||
 * **W** ||  || **X** ||   || **Y** ||   || **Z** || || ||


 * || || || **A.** || X || ||
 * || Answered Correct: || || || **B.** || Z || ||
 * || || || **C.** || Y || ||
 * || || || **D.** || W || ||

|| ||  || What is the x-coordinate of the vertex for the parabola defined by the function y = x2 + 9x + 7? || ||


 * || Correct Answer: || || || **A.** || -9/2 || ||
 * || || || **B.** || 9/2 || ||
 * || Answered Incorrect: || || || **C.** || -1/18 || ||
 * || || || **D.** || -9 || ||

|| ||  || What is the equation for the axis of symmetry of the quadratic function //f(x)// = 2//x//2 + 12//x// - 14? || ||


 * || || || **A.** || //x// = 3 || ||
 * || || || **B.** || //x// = 2 || ||
 * || Answered Incorrect: || || || **C.** || //x// = -6 || ||
 * || Correct Answer: || || || **D.** || //x// = -3 || ||

|| ||  || Vincente put his money into a mutual fund, where the amount of money he earned or lost can be found using the equation below, where //M// is the money Vincente earned or lost and //x// is time in years. //M// = //x//2 - 8//x// + 191 If Vincente gained $200, how long did he have his money in the mutual fund? || ||


 * || Correct Answer: || || || **A.** || 9 years || ||
 * || Answered Incorrect: || || || **B.** || 10 years || ||
 * || || || **C.** || 1 year || ||
 * || || || **D.** || 8 years || ||

|| ||  || || **x** || **y** || Which of the following equations matches the table shown above? || ||
 * 1 || -21 ||
 * 2 || -24 ||
 * 3 || -25 ||
 * 4 || -24 ||
 * 5 || -21 ||


 * || || || **A.** || //y// = -6//x// - 15 || ||
 * || || || **B.** || //y// = //x2 + 6//x// - 16// || ||
 * || Answered Correct: || || || **C.** || //y// = //x//2 - 6//x// - 16 || ||
 * || || || **D.** || //y// = //x//3 - 21 || ||

|| ||  || The curve given by the equation //y// = 2//x//2 - 3 is graphed above. How will the graph of the equation be affected if the equation is changed to //y// = -2//x//2 - 3? || ||


 * || Answered Correct: || || || **A.** || The graph will open down. || ||
 * || || || **B.** || The graph will be the same. || ||
 * || || || **C.** || The graph will be shifted down. || ||
 * || || || **D.** || The graph will be wider. || ||

|| ||  || y = x2 + 8x + 7 What are the x-intercepts of the graph of the equation above? || ||


 * || || || **A.** || (1, 0) and (7, 0) || ||
 * || || || **B.** || (-1, 0) and (7, 0) || ||
 * || || || **C.** || (1, 0) and (-7, 0) || ||
 * || Answered Correct: || || || **D.** || (-1, 0) and (-7, 0) || ||

|| ||  || y = x2 + 1x - 12 Will the graph of the equation above intersect the x-axis in zero, one, or two points?

(//Use factoring to help you answer this question.//) || ||


 * || || || **A.** || one || ||
 * || Answered Correct: || || || **B.** || two || ||
 * || || || **C.** || zero || ||
 * || || || **D.** || There is not enough information. || ||

|| ||  ||  Which of the following equations fits this graph? || ||


 * || Correct Answer: || || || **A.** || y = -2x2 + 4x + 1 || ||
 * || Answered Incorrect: || || || **B.** || y = 2x2 + 4x + 1 || ||
 * || || || **C.** || y = 2x2 + 2x - 1 || ||
 * || || || **D.** || y = -2x2 + x + 1 || ||

|| ||  || Which of the following represents the equation of a parabola that opens down and is narrower than the graph of //y// = //x//2? || ||


 * || || || **A.** || [[image:http://media.studyisland.com/cgi-bin/mimetex.cgi?y%5C%20=%5C%20%5Cfrac%7B1%7D%7B3%7Dx%5E%7B2%7D%5C%20-%5C%208x%5C%20+%5C%2014]] || ||
 * || Answered Incorrect: || || || **B.** || [[image:http://media.studyisland.com/cgi-bin/mimetex.cgi?y%5C%20=%5C%20-%5Cfrac%7B1%7D%7B3%7Dx%5E%7B2%7D%5C%20+%5C%208x%5C%20+%5C%2014]] || ||
 * || || || **C.** || [[image:http://media.studyisland.com/cgi-bin/mimetex.cgi?y%5C%20=%5C%203x%5E%7B2%7D%5C%20-%5C%208x%5C%20+%5C%2014]] || ||
 * || Correct Answer: || || || **D.** || [[image:http://media.studyisland.com/cgi-bin/mimetex.cgi?y%5C%20=%5C%20-3x%5E%7B2%7D%5C%20+%5C%208x%5C%20+%5C%2014]] || ||

|| ||  || The curve given by the equation //y// = 2//x//2 - 3 is graphed above. How will the graph of the equation be affected if the equation is changed to //y// = 2//x//2 + 2? || ||


 * || || || **A.** || The graph will be wider. || ||
 * || Answered Correct: || || || **B.** || The graph will be shifted up. || ||
 * || || || **C.** || The graph will be the same. || ||
 * || || || **D.** || The graph will be shifted down. || ||

|| ||  ||  Which of the following equations fits this graph? || ||


 * || Answered Correct: || || || **A.** || y = x2 + 2x - 3 || ||
 * || || || **B.** || y = x2 - x - 3 || ||
 * || || || **C.** || y = x2 + 2x + 3 || ||
 * || || || **D.** || y = 2x2 + 4x - 3 || ||

|| ||  || Phil hit 3 more home runs than Charlie did last season. The product of their home runs from last season is 238. How many home runs did Charlie hit last season? || ||


 * || || || **A.** || 20 || ||
 * || || || **B.** || 235 || ||
 * || Answered Correct: || || || **C.** || 14 || ||
 * || || || **D.** || 17 || ||

|| ||  || In which direction must the graph of f(x) = x2 be shifted to produce the graph of g(x) = (x - 8)2? || ||


 * || || || **A.** || up || ||
 * || || || **B.** || left || ||
 * || || || **C.** || down || ||
 * || Answered Correct: || || || **D.** || right || ||

|| ||  || A quadratic equation is written in 4 equivalent forms below. # y = (x + 5)2 - 9
 * 1) y = x2 + 10x + 16
 * 2) y = (x + 2)(x + 8)
 * 3) y = x(x + 2) + 8(x + 2)

Which of the forms shown above would be the most useful if attempting to find the y-intercept of the quadratic equation? || ||


 * || || || **A.** || IV. || ||
 * || || || **B.** || III. || ||
 * || Answered Correct: || || || **C.** || II. || ||
 * || || || **D.** || I. || ||

|| ||  || y = x2 + 1x - 12 What are the x-intercepts of the graph of the equation above? || ||


 * || || || **A.** || (4, 0) and (-3, 0) || ||
 * || || || **B.** || (4, 0) and (3, 0) || ||
 * || Answered Correct: || || || **C.** || (-4, 0) and (3, 0) || ||
 * || || || **D.** || (-4, 0) and (-3, 0) || ||

|| ||  || y = -1x2 + 9x + 14 Will the parabola of this equation open upward or downward? || ||


 * || Answered Correct: || || || **A.** || downward || ||
 * || || || **B.** || upward || ||
 * || || || **C.** || There is not enough information. || ||

||