Cody

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!

Submitted March 7:


 * || **Report:** || **All Questions
 * **Program:** || **Algebra II**  ||
 * **Test:** || **Working With Quadratics**  ||
 * **User:** || **Seiber, Cody**  ||
 * **Session Date:** || **03/08/11 - 10:47 AM CST**  ||
 * **% Correct:** || **(5/33) 15.2%**  ||
 * **Correct Questions:** || **5**  ||
 * **Missed Questions:** || **28**  || ||
 * **Missed Questions:** || **28**  || ||


 * View Missed | View Correct | View All ||
 * || ||  || Annalise, Torah, and Samantha are cousins. Annalise is 3 years older than Torah, and Samantha is 2 years older than Annalise. If the product of Annalise's and Samantha's ages is 195, how old is Annalise? || ||
 * || ||  || Annalise, Torah, and Samantha are cousins. Annalise is 3 years older than Torah, and Samantha is 2 years older than Annalise. If the product of Annalise's and Samantha's ages is 195, how old is Annalise? || ||


 * || || || **A.** || 15 || ||
 * || || || **B.** || 23 || ||
 * || Correct Answer: || || || **C.** || 13 || ||
 * || Answered Incorrect: || || || **D.** || 10 || ||

|| ||  || 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 = x-2 || ||
 * || Correct Answer: || || || **B.** || y = -x2 || ||
 * || Answered Incorrect: || || || **C.** || y = x2 - 1 || ||
 * || || || **D.** || y = [[image:http://www61.studyisland.com/userfiles/sqrt.gif]]x || ||

|| ||  || A quadratic equation is written in 4 equivalent forms below. # y = (x + 5)2 - 1
 * 1) y = x2 + 10x + 24
 * 2) y = (x + 4)(x + 6)
 * 3) y = x(x + 4) + 6(x + 4)

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


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

|| ||  || y = x2 + 2x - 8 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.** || There is not enough information. || ||
 * || Correct Answer: || || || **B.** || two || ||
 * || || || **C.** || zero || ||
 * || Answered Incorrect: || || || **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 + 32//t// After how many seconds will the ball hit the ground? || ||


 * || Answered Correct: || || || **A.** || 2 || ||
 * || || || **B.** || 32 || ||
 * || || || **C.** || 3 || ||
 * || || || **D.** || 1 || ||

|| ||  || y = x2 + 7x + 10 What are the x-intercepts of the graph of the equation above? || ||


 * || || || **A.** || (-2, 0) and (5, 0) || ||
 * || || || **B.** || (2, 0) and (5, 0) || ||
 * || || || **C.** || (2, 0) and (-5, 0) || ||
 * || Answered Correct: || || || **D.** || (-2, 0) and (-5, 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// + 79 If Vincente gained $100, how long did he have his money in the mutual fund? || ||


 * || Correct Answer: || || || **A.** || 7 years || ||
 * || || || **B.** || 3 years || ||
 * || || || **C.** || 8 years || ||
 * || Answered Incorrect: || || || **D.** || 6 years || ||

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


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

|| ||  || The curve given by the equation //y// = 2//x//2 - 2 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 shifted down. || ||
 * || || || **B.** || The graph will be the same. || ||
 * || Answered Correct: || || || **C.** || The graph will open down. || ||
 * || || || **D.** || The graph will be wider. || ||

|| ||  || In which direction must the graph of f(x) = x2 be shifted to produce the graph of g(x) = (x - 5)2? || ||


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

|| ||  || If the graph of f(x) = x2 is shifted 5 units to the right, then what would be the equation of the new graph? || ||


 * || Correct Answer: || || || **A.** || g(x) = (x - 5)2 || ||
 * || Answered Incorrect: || || || **B.** || g(x) = (x + 5)2 || ||
 * || || || **C.** || g(x) = x2 - 5 || ||
 * || || || **D.** || g(x) = x2 + 5 || ||

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


 * || A = 84 m2 || || //x// - 3 ||
 * //x// + 5 ||  ||

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


 * || Correct Answer: || || || **A.** || 14 m by 6 m || ||
 * || || || **B.** || 42 m by 2 m || ||
 * || Answered Incorrect: || || || **C.** || 9 m by 11 m || ||
 * || || || **D.** || 5 m by 3 m || ||

|| ||  || 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%7B4%7Dx%5E%7B2%7D%5C%20-%5C%205x%5C%20+%5C%2013]] || ||
 * || Correct Answer: || || || **B.** || [[image:http://media.studyisland.com/cgi-bin/mimetex.cgi?y%5C%20=%5C%20-4x%5E%7B2%7D%5C%20+%5C%205x%5C%20+%5C%2013]] || ||
 * || Answered Incorrect: || || || **C.** || [[image:http://media.studyisland.com/cgi-bin/mimetex.cgi?y%5C%20=%5C%20-%5Cfrac%7B1%7D%7B4%7Dx%5E%7B2%7D%5C%20+%5C%205x%5C%20+%5C%2013]] || ||
 * || || || **D.** || [[image:http://media.studyisland.com/cgi-bin/mimetex.cgi?y%5C%20=%5C%204x%5E%7B2%7D%5C%20-%5C%205x%5C%20+%5C%2013]] || ||

|| ||  || 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.//) || ||


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

|| ||  || What is the equation for the axis of symmetry of the quadratic function //f(x)// = 3//x//2 + 18//x// - 14? || ||


 * Did Not Answer ||
 * || Correct Answer: || || || **A.** || //x// = -3 || ||
 * || || || **B.** || //x// = 3 || ||
 * || || || **C.** || //x// = -6 || ||
 * || || || **D.** || //x// = -2 || ||

|| ||  || y = -2x2 + 9x + 18 Will the parabola of this equation open upward or downward? || ||


 * Did Not Answer ||
 * || || || **A.** || upward || ||
 * || Correct Answer: || || || **B.** || downward || ||
 * || || || **C.** || There is not enough information. || ||

|| ||  || y = x2 + 3x - 10 What are the x-intercepts of the graph of the equation above? || ||


 * Did Not Answer ||
 * || Correct Answer: || || || **A.** || (-5, 0) and (2, 0) || ||
 * || || || **B.** || (-5, 0) and (-2, 0) || ||
 * || || || **C.** || (5, 0) and (2, 0) || ||
 * || || || **D.** || (5, 0) and (-2, 0) || ||

|| ||  || 2x2 - 1x = -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.//) || ||


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

|| ||  || || **x** || **y** || Which of the following equations matches the table shown above? || ||
 * -3 || -21 ||
 * -2 || -24 ||
 * -1 || -25 ||
 * 0 || -24 ||
 * 1 || -21 ||


 * Did Not Answer ||
 * || || || **A.** || //y// = 2//x// - 15 || ||
 * || Correct Answer: || || || **B.** || //y// = //x//2 + 2//x// - 24 || ||
 * || || || **C.** || //y// = //x//3 - 21 || ||
 * || || || **D.** || //y// = //x2 - 2//x// - 24// || ||

|| ||  || Dale is 4 years older than Chip. The product of their ages is 252. How old is Dale? || ||


 * Did Not Answer ||
 * || Correct Answer: || || || **A.** || 18 || ||
 * || || || **B.** || 22 || ||
 * || || || **C.** || 10 || ||
 * || || || **D.** || 14 || ||

|| ||  || In which direction must the graph of f(x) = x2 be shifted to produce the graph of g(x) = x2 - 5? || ||


 * Did Not Answer ||
 * || Correct Answer: || || || **A.** || down || ||
 * || || || **B.** || left || ||
 * || || || **C.** || up || ||
 * || || || **D.** || right || ||

|| ||  || y = x2 - 16 Which of the following tables matches the equation shown above? || || **x** || **y** ||
 * -1 || -12 ||
 * 0 || -16 ||
 * 1 || -12 ||
 * 2 || -12 || ||  || || **x** || **y** ||
 * -1 || -13 ||
 * 0 || -19 ||
 * 1 || -13 ||
 * 2 || -12 || ||  || || **x** || **y** ||
 * -1 || -15 ||
 * 0 || -16 ||
 * 1 || -15 ||
 * 2 || -12 || ||  || || **x** || **y** ||
 * -1 || -15 ||
 * 0 || -16 ||
 * 1 || -15 ||
 * 2 || 20 || ||
 * **W** ||  || **X** ||   || **Y** ||   || **Z** || || ||


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

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


 * Did Not Answer ||
 * || || || **A.** || The graph will be wider. || ||
 * || || || **B.** || The graph will be shifted down. || ||
 * || || || **C.** || The graph will be the same. || ||
 * || Correct Answer: || || || **D.** || The graph will be shifted up. || ||

|| ||  || A quadratic equation is written in 4 equivalent forms below. # y = (x + 5)2 - 1
 * 1) y = x2 + 10x + 24
 * 2) y = (x + 4)(x + 6)
 * 3) y = x(x + 10) + 24

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


 * Did Not Answer ||
 * || || || **A.** || III. || ||
 * || || || **B.** || II. || ||
 * || Correct Answer: || || || **C.** || I. || ||
 * || || || **D.** || IV. || ||

|| ||  || y = x2 + 3x - 10 What are the x-intercepts of the graph of the equation above? || ||


 * Did Not Answer ||
 * || || || **A.** || (-5, 0) and (-2, 0) || ||
 * || || || **B.** || (5, 0) and (2, 0) || ||
 * || Correct Answer: || || || **C.** || (-5, 0) and (2, 0) || ||
 * || || || **D.** || (5, 0) and (-2, 0) || ||

|| ||  || What is the x-coordinate of the vertex for the parabola defined by the function y = -3x2 + 8x - 7? || ||


 * Did Not Answer ||
 * || || || **A.** || -4/3 || ||
 * || Correct Answer: || || || **B.** || 4/3 || ||
 * || || || **C.** || -8 || ||
 * || || || **D.** || 3/16 || ||

|| ||  || If the graph of f(x) = x2 is shifted down 5 units, then what would be the equation of the new graph? || ||


 * Did Not Answer ||
 * || || || **A.** || g(x) = (x - 5)2 || ||
 * || Correct Answer: || || || **B.** || g(x) = x2 - 5 || ||
 * || || || **C.** || g(x) = x2 + 5 || ||
 * || || || **D.** || g(x) = (x + 5)2 || ||

|| ||  || A quadratic equation is written in 4 equivalent forms below. # y = (x + 5)2 - 1
 * 1) y = x2 + 10x + 24
 * 2) y = (x + 4)(x + 6)
 * 3) y = x(x + 10) + 24

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


 * Did Not Answer ||
 * || || || **A.** || IV. || ||
 * || Correct Answer: || || || **B.** || III. || ||
 * || || || **C.** || II. || ||
 * || || || **D.** || I. || ||

|| ||  || 16x + 8 = -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.//) || ||


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

|| ||  || Phil hit 10 more home runs than Charlie did last season. The product of their home runs from last season is 231. How many home runs did Charlie hit last season? || ||


 * Did Not Answer ||
 * || || || **A.** || 31 || ||
 * || || || **B.** || 21 || ||
 * || Correct Answer: || || || **C.** || 11 || ||
 * || || || **D.** || 221 || ||

|| ||  || y = 4x2 + 8x + 12 Will the parabola of this equation open upward or downward? || ||


 * Did Not Answer ||
 * || || || **A.** || downward || ||
 * || || || **B.** || There is not enough information. || ||
 * || Correct Answer: || || || **C.** || upward || ||

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


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

|| ||  || y = x2 + 7x + 10 What are the x-intercepts of the graph of the equation above? || ||


 * Did Not Answer ||
 * || || || **A.** || (2, 0) and (5, 0) || ||
 * || || || **B.** || (-2, 0) and (5, 0) || ||
 * || Correct Answer: || || || **C.** || (-2, 0) and (-5, 0) || ||
 * || || || **D.** || (2, 0) and (-5, 0) || ||

||