Joey

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:** || **IMPERIOLI, JOSEPH**  ||
 * **Session Date:** || **03/09/11 - 9:01 AM CST**  ||
 * **% Correct:** || **(19/33) 57.6%**  ||
 * **Correct Questions:** || **19**  ||
 * **Missed Questions:** || **14**  ||   ||

||  ||   || What is the equation for the axis of symmetry of the quadratic function //f(x)// = 4//x//2 + 24//x// - 14? ||  ||
 * View Missed | View Correct | View All ||


 * ||  ||   || **A.** || //x// = 4 ||   ||
 * || Answered Incorrect: ||  ||   || **B.** || //x// = 3 ||   ||
 * || Correct Answer: ||  ||   || **C.** || //x// = -3 ||   ||
 * ||  ||   || **D.** || //x// = -6 ||   ||

|| || || Annalise, Torah, and Samantha are cousins. Annalise is 4 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? || ||


 * ||  ||   || **A.** || 24 ||   ||
 * ||  ||   || **B.** || 10 ||   ||
 * || Correct Answer: ||  ||   || **C.** || 14 ||   ||
 * || Answered Incorrect: ||  ||   || **D.** || 17 ||   ||

|| || || y = x2 + 3x - 18 What are the x-intercepts of the graph of the equation above? || ||


 * || Answered Correct: ||  ||   || **A.** || (-6, 0) and (3, 0) ||   ||
 * ||  ||   || **B.** || (6, 0) and (-3, 0) ||   ||
 * ||  ||   || **C.** || (-6, 0) and (-3, 0) ||   ||
 * ||  ||   || **D.** || (6, 0) and (3, 0) ||   ||

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

|| || || A quadratic equation is written in 4 equivalent forms below. # y = (x + 7)2 - 1
 * 1) y = x2 + 14x + 48
 * 2) y = (x + 6)(x + 8)
 * 3) y = x(x + 14) + 48

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

|| || || y = x2 + 3x - 18 What are the x-intercepts of the graph of the equation above? || ||


 * || Answered Correct: ||  ||   || **A.** || (-6, 0) and (3, 0) ||   ||
 * ||  ||   || **B.** || (-6, 0) and (-3, 0) ||   ||
 * ||  ||   || **C.** || (6, 0) and (3, 0) ||   ||
 * ||  ||   || **D.** || (6, 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 - 5//x// + 64 If Vincente gained $100, how long did he have his money in the mutual fund? || ||


 * || Answered Correct: ||  ||   || **A.** || 9 years ||   ||
 * ||  ||   || **B.** || 10 years ||   ||
 * ||  ||   || **C.** || 8 years ||   ||
 * ||  ||   || **D.** || 4 years ||   ||

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


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

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


 * || A = 80 m2 ||  || //x// - 4 ||
 * //x// + 7 ||  ||

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


 * || Answered Correct: ||  ||   || **A.** || 16 m by 5 m ||   ||
 * ||  ||   || **B.** || 7 m by 4 m ||   ||
 * ||  ||   || **C.** || 40 m by 2 m ||   ||
 * ||  ||   || **D.** || 9 m by 12 m ||   ||

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


 * ||  ||   || **A.** || //y// = -2//x// - 79 ||   ||
 * ||  ||   || **B.** || //y// = //x2 + 2//x //- 80// ||   ||
 * || Answered Correct: ||  ||   || **C.** || //y// = //x//2 - 2//x// - 80 ||   ||
 * ||  ||   || **D.** || //y// = //x//3 - 77 ||   ||

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


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

|| || || A quadratic equation is written in 4 equivalent forms below. # y = (x + 7)2 - 1
 * 1) y = x2 + 14x + 48
 * 2) y = (x + 6)(x + 8)
 * 3) y = x(x + 14) + 48

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


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

|| || || y = 4x2 + 11x + 24 Will the parabola of this equation open upward or downward? || ||


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

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


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

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


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

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


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

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


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

|| || || Dale is 6 years older than Chip. The product of their ages is 520. How old is Dale? || ||


 * ||  ||   || **A.** || 32 ||   ||
 * ||  ||   || **B.** || 20 ||   ||
 * ||  ||   || **C.** || 14 ||   ||
 * || Answered Correct: ||  ||   || **D.** || 26 ||   ||

|| || || 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]] ||   ||
 * || Answered Correct: ||  ||   || **B.** || [[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]] ||   ||
 * ||  ||   || **C.** || [[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]] ||   ||
 * ||  ||   || **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]] ||   ||

|| || || Phil hit 8 more home runs than Charlie did last season. The product of their home runs from last season is 345. How many home runs did Charlie hit last season? || ||


 * ||  ||   || **A.** || 31 ||   ||
 * || Answered Correct: ||  ||   || **B.** || 15 ||   ||
 * ||  ||   || **C.** || 23 ||   ||
 * ||  ||   || **D.** || 337 ||   ||

|| || || 28x + 8 = -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.//) || ||


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

|| || || y = x2 - 2x - 48 Which of the following tables matches the equation shown above? || || **x** || **y** ||
 * 0 || -41 ||
 * 1 || -49 ||
 * 2 || -41 ||
 * 3 || -45 ||  ||   ||   || **x** || **y** ||
 * 0 || -46 ||
 * 1 || -52 ||
 * 2 || -46 ||
 * 3 || -45 ||  ||   ||   || **x** || **y** ||
 * 0 || -48 ||
 * 1 || -49 ||
 * 2 || -48 ||
 * 3 || -45 ||  ||   ||   || **x** || **y** ||
 * 0 || -48 ||
 * 1 || -49 ||
 * 2 || -48 ||
 * 3 || 51 ||  ||
 * **W** ||  || **X** ||   || **Y** ||   || **Z** ||   ||   ||


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

|| || || If the graph of f(x) = x2 is shifted 7 units to the left, then what would be the equation of the new graph? || ||


 * Did Not Answer ||
 * ||  ||   || **A.** || g(x) = x2 + 7 ||   ||
 * ||  ||   || **B.** || g(x) = x2 - 7 ||   ||
 * ||  ||   || **C.** || g(x) = (x - 7)2 ||   ||
 * || Correct Answer: ||  ||   || **D.** || g(x) = (x + 7)2 ||   ||

|| || || 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 ||
 * ||  ||   || **A.** || 1 ||   ||
 * || Correct Answer: ||  ||   || **B.** || 3 ||   ||
 * ||  ||   || **C.** || 48 ||   ||
 * ||  ||   || **D.** || 2 ||   ||

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


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

|| || || If the graph of f(x) = x2 is shifted up 7 units, then what would be the equation of the new graph? || ||


 * Did Not Answer ||
 * || Correct Answer: ||  ||   || **A.** || g(x) = x2 + 7 ||   ||
 * ||  ||   || **B.** || g(x) = (x - 7)2 ||   ||
 * ||  ||   || **C.** || g(x) = (x + 7)2 ||   ||
 * ||  ||   || **D.** || g(x) = x2 - 7 ||   ||

|| || || What is the x-coordinate of the vertex for the parabola defined by the function y = 4x2 + 8x + 7? || ||


 * Did Not Answer ||
 * ||  ||   || **A.** || 1 ||   ||
 * ||  ||   || **B.** || -1/4 ||   ||
 * ||  ||   || **C.** || -8 ||   ||
 * || Correct Answer: ||  ||   || **D.** || -1 ||   ||

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


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

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


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

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


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

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


 * Did Not Answer ||
 * ||  ||   || **A.** || y = [[image:http://www86.studyisland.com/userfiles/sqrt.gif]]x ||   ||
 * ||  ||   || **B.** || y = x-2 ||   ||
 * || Correct Answer: ||  ||   || **C.** || y = -x2 ||   ||
 * ||  ||   || **D.** || y = x2 - 1 ||   ||

|| || || 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? || ||


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

|| || || A quadratic equation is written in 4 equivalent forms below. # y = (x + 7)2 - 1
 * 1) y = x2 + 14x + 48
 * 2) y = (x + 6)(x + 8)
 * 3) y = x(x + 6) + 8(x + 6)

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


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