Chelsea

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!

Results submitted March 7:


 * || **Report:** || **All Questions
 * **Program:** || **Algebra II**  ||
 * **Test:** || **Working With Quadratics**  ||
 * **User:** || **Hagans, Chelsea**  ||
 * **Session Date:** || **03/07/11 - 10:57 AM CST**  ||
 * **% Correct:** || **(15/33) 45.5%**  ||
 * **Correct Questions:** || **15**  ||
 * **Missed Questions:** || **18**  || ||
 * **Missed Questions:** || **18**  || ||


 * View Missed | View Correct | View All ||
 * || ||  || A quadratic equation is written in 4 equivalent forms below. # y = x2 - 2x - 80
 * 1) y = (x + 8)(x - 10)
 * 2) y = (x - 1)2 - 81
 * 3) y = x(x - 2) - 80
 * 1) y = x(x - 2) - 80

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


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

|| ||  || In which direction must the graph of f(x) = x2 be shifted to produce the graph of g(x) = x2 + 9? || ||


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

|| ||  || y = x2 + 10x + 21 What are the x-intercepts of the graph of the equation above? || ||


 * || || || **A.** || (3, 0) and (7, 0) || ||
 * || || || **B.** || (3, 0) and (-7, 0) || ||
 * || Answered Correct: || || || **C.** || (-3, 0) and (-7, 0) || ||
 * || || || **D.** || (-3, 0) and (7, 0) || ||

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


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

|| ||  || If the graph of f(x) = x2 is shifted up 9 units, then what would be the equation of the new graph? || ||


 * || Answered Correct: || || || **A.** || g(x) = x2 + 9 || ||
 * || || || **B.** || g(x) = x2 - 9 || ||
 * || || || **C.** || g(x) = (x + 9)2 || ||
 * || || || **D.** || g(x) = (x - 9)2 || ||

|| ||  || A quadratic equation is written in 4 equivalent forms below. # y = x2 - 2x - 80
 * 1) y = (x + 8)(x - 10)
 * 2) y = (x - 1)2 - 81
 * 3) y = x(x - 2) - 80

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


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

|| ||  || In which direction must the graph of f(x) = x2 be shifted to produce the graph of g(x) = (x + 9)2? || ||


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

|| ||  || Phil hit 10 more home runs than Charlie did last season. The product of their home runs from last season is 375. How many home runs did Charlie hit last season? || ||


 * || Answered Incorrect: || || || **A.** || 365 || ||
 * || Correct Answer: || || || **B.** || 15 || ||
 * || || || **C.** || 35 || ||
 * || || || **D.** || 25 || ||

|| ||  || Annalise, Torah, and Samantha are cousins. Annalise is 5 years older than Torah, and Samantha is 3 years older than Annalise. If the product of Annalise's and Samantha's ages is 238, how old is Annalise? || ||


 * || Answered Incorrect: || || || **A.** || 9 || ||
 * || || || **B.** || 23 || ||
 * || Correct Answer: || || || **C.** || 14 || ||
 * || || || **D.** || 17 || ||

|| ||  || y = 4x2 + 12x + 32 Will the parabola of this equation open upward or downward? || ||


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

|| ||  || What is the equation for the axis of symmetry of the quadratic function //f(x)// = 5//x//2 + 30//x// - 4? || ||


 * || Answered Correct: || || || **A.** || //x// = -3 || ||
 * || || || **B.** || //x// = 5 || ||
 * || || || **C.** || //x// = 3 || ||
 * || || || **D.** || //x// = -6 || ||

|| ||  || A quadratic equation is written in 4 equivalent forms below. # y = x2 - 2x - 80
 * 1) y = (x + 8)(x - 10)
 * 2) y = (x - 1)2 - 81
 * 3) y = x(x + 8) - 10(x + 8)

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


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

|| ||  || || **x** || **y** || Which of the following equations matches the table shown above? || ||
 * -3 || -77 ||
 * -2 || -80 ||
 * -1 || -81 ||
 * 0 || -80 ||
 * 1 || -77 ||


 * || Answered Correct: || || || **A.** || //y// = //x//2 + 2//x// - 80 || ||
 * || || || **B.** || //y// = 2//x// - 71 || ||
 * || || || **C.** || //y// = //x2 - 2//x// - 80// || ||
 * || || || **D.** || //y// = //x//3 - 77 || ||

|| ||  || 2x2 + 4x = -2 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 || ||
 * || Answered Correct: || || || **C.** || one || ||
 * || || || **D.** || There is not enough information. || ||

|| ||  || The curve given by the equation //y// = 3//x//2 - 3 is graphed above. How will the graph of the equation be affected if the equation is changed to //y// = 3//x//2 + 1? || ||


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

|| ||  || 3x2 - 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.** || two || ||
 * || Answered Incorrect: || || || **B.** || one || ||
 * || Correct Answer: || || || **C.** || zero || ||
 * || || || **D.** || There is not enough information. || ||

|| ||  || Dale is 7 years older than Chip. The product of their ages is 494. How old is Dale? || ||


 * || || || **A.** || 33 || ||
 * || || || **B.** || 19 || ||
 * || Answered Correct: || || || **C.** || 26 || ||
 * || || || **D.** || 12 || ||

|| ||  || If the graph of f(x) = x2 is shifted 9 units to the left, then what would be the equation of the new graph? || ||


 * || || || **A.** || g(x) = (x - 9)2 || ||
 * || Answered Incorrect: || || || **B.** || g(x) = x2 + 9 || ||
 * || Correct Answer: || || || **C.** || g(x) = (x + 9)2 || ||
 * || || || **D.** || g(x) = x2 - 9 || ||

|| ||  || 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%7B5%7Dx%5E%7B2%7D%5C%20+%5C%209x%5C%20+%5C%2013]] || ||
 * || || || **B.** || [[image:http://media.studyisland.com/cgi-bin/mimetex.cgi?y%5C%20=%5C%20%5Cfrac%7B1%7D%7B5%7Dx%5E%7B2%7D%5C%20-%5C%209x%5C%20+%5C%2013]] || ||
 * || Answered Correct: || || || **C.** || [[image:http://media.studyisland.com/cgi-bin/mimetex.cgi?y%5C%20=%5C%20-5x%5E%7B2%7D%5C%20+%5C%209x%5C%20+%5C%2013]] || ||
 * || || || **D.** || [[image:http://media.studyisland.com/cgi-bin/mimetex.cgi?y%5C%20=%5C%205x%5E%7B2%7D%5C%20-%5C%209x%5C%20+%5C%2013]] || ||

|| ||  || y = x2 + 10x + 21 What are the x-intercepts of the graph of the equation above? || ||


 * || || || **A.** || (3, 0) and (-7, 0) || ||
 * || || || **B.** || (3, 0) and (7, 0) || ||
 * || || || **C.** || (-3, 0) and (7, 0) || ||
 * || Answered Correct: || || || **D.** || (-3, 0) and (-7, 0) || ||

|| ||  || What is the x-coordinate of the vertex for the parabola defined by the function y = 5x2 - 8x - 2? || ||


 * || || || **A.** || 5/16 || ||
 * || Correct Answer: || || || **B.** || 4/5 || ||
 * || Answered Incorrect: || || || **C.** || -4/5 || ||
 * || || || **D.** || 8 || ||

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


 * || Correct Answer: || || || **A.** || y = -x2 || ||
 * || Answered Incorrect: || || || **B.** || y = x2 - 1 || ||
 * || || || **C.** || y = [[image:http://www91.studyisland.com/userfiles/sqrt.gif]]x || ||
 * || || || **D.** || y = x-2 || ||

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


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

|| ||  || y = x2 + 2x - 15 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.//) || ||


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

|| ||  || y = -2x2 + 11x + 28 Will the parabola of this equation open upward or downward? || ||


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

|| ||  || y = x2 + 4x - 21 What are the x-intercepts of the graph of the equation above? || ||


 * || || || **A.** || (7, 0) and (-3, 0) || ||
 * || || || **B.** || (-7, 0) and (-3, 0) || ||
 * || Answered Correct: || || || **C.** || (-7, 0) and (3, 0) || ||
 * || || || **D.** || (7, 0) and (3, 0) || ||

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


 * || A = 90 m2 || || //x// - 4 ||
 * //x// + 9 ||  ||

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


 * || Correct Answer: || || || **A.** || 18 m by 5 m || ||
 * || Answered Incorrect: || || || **B.** || 9 m by 14 m || ||
 * || || || **C.** || 45 m by 2 m || ||
 * || || || **D.** || 9 m by 4 m || ||

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


 * Did Not Answer ||
 * || || || **A.** || y = x2 - x - 3 || ||
 * || || || **B.** || y = 2x2 + 4x - 3 || ||
 * || Correct Answer: || || || **C.** || y = x2 + 2x - 3 || ||
 * || || || **D.** || y = x2 + 2x + 3 || ||

|| ||  || 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 + 48//t// After how many seconds will the ball hit the ground? || ||


 * Did Not Answer ||
 * || Correct Answer: || || || **A.** || 3 || ||
 * || || || **B.** || 0 || ||
 * || || || **C.** || 1 || ||
 * || || || **D.** || 2 || ||

|| ||  || y = x2 - 64 Which of the following tables matches the equation shown above? || || **x** || **y** ||
 * -1 || -60 ||
 * 0 || -64 ||
 * 1 || -60 ||
 * 2 || -60 || ||  || || **x** || **y** ||
 * -1 || -61 ||
 * 0 || -67 ||
 * 1 || -61 ||
 * 2 || -60 || ||  || || **x** || **y** ||
 * -1 || -63 ||
 * 0 || -64 ||
 * 1 || -63 ||
 * 2 || -60 || ||  || || **x** || **y** ||
 * -1 || -63 ||
 * 0 || -64 ||
 * 1 || -63 ||
 * 2 || 68 || ||
 * **W** ||  || **X** ||   || **Y** ||   || **Z** || || ||


 * Did Not Answer ||
 * || Correct Answer: || || || **A.** || Y || ||
 * || || || **B.** || W || ||
 * || || || **C.** || Z || ||
 * || || || **D.** || X || ||

|| ||  || 20x + 4 = -8x2 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.//) || ||


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

|| ||  || y = x2 + 4x - 21 What are the x-intercepts of the graph of the equation above? || ||


 * Did Not Answer ||
 * || || || **A.** || (7, 0) and (-3, 0) || ||
 * || || || **B.** || (-7, 0) and (-3, 0) || ||
 * || Correct Answer: || || || **C.** || (-7, 0) and (3, 0) || ||
 * || || || **D.** || (7, 0) and (3, 0) || ||

|| ||  || 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 - 4//x// + 55 If Vincente gained $100, how long did he have his money in the mutual fund? || ||


 * Did Not Answer ||
 * || || || **A.** || 10 years || ||
 * || Correct Answer: || || || **B.** || 9 years || ||
 * || || || **C.** || 8 years || ||
 * || || || **D.** || 5 years || ||

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