Kirkley

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 Monday, March 7:

||
 * || **Report:** || **All Questions**
 * **Program:** || **Algebra II**  ||
 * **Test:** || **Working With Quadratics**  ||
 * **User:** || **Lear, Kirkley**  ||
 * **Session Date:** || **03/07/11 - 10:45 AM CST**  ||
 * **% Correct:** || **(23/33) 69.7%**  ||
 * **Correct Questions:** || **23**  ||
 * **Missed Questions:** || **10**  ||   ||

||  ||   || y = x2 + 2x - 15 What are the x-intercepts of the graph of the equation above? ||  ||
 * View Missed | View Correct | View All ||


 * ||  ||   || **A.** || (5, 0) and (-3, 0) ||   ||
 * || Answered Correct: ||  ||   || **B.** || (-5, 0) and (3, 0) ||   ||
 * ||  ||   || **C.** || (5, 0) and (3, 0) ||   ||
 * ||  ||   || **D.** || (-5, 0) and (-3, 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.//) || ||


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

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


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

|| || || If the graph of f(x) = x2 is shifted up 4 units, then what would be the equation of the new graph? || ||


 * ||  ||   || **A.** || g(x) = (x + 4)2 ||   ||
 * || Answered Correct: ||  ||   || **B.** || g(x) = x2 + 4 ||   ||
 * ||  ||   || **C.** || g(x) = (x - 4)2 ||   ||
 * ||  ||   || **D.** || g(x) = x2 - 4 ||   ||

|| || || A quadratic equation is written in 4 equivalent forms below. # y = x(x - 2) - 24
 * 1) y = (x - 1)2 - 25
 * 2) y = x2 - 2x - 24
 * 3) y = (x + 4)(x - 6)

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


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

|| || || Annalise, Torah, and Samantha are cousins. Annalise is 2 years 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? || ||


 * || Answered Correct: ||  ||   || **A.** || 12 ||   ||
 * ||  ||   || **B.** || 22 ||   ||
 * ||  ||   || **C.** || 10 ||   ||
 * ||  ||   || **D.** || 15 ||   ||

|| || || 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? || ||


 * Did Not Answer ||
 * ||  ||   || **A.** || 2 ||   ||
 * || Correct Answer: ||  ||   || **B.** || 1 ||   ||
 * ||  ||   || **C.** || 0 ||   ||
 * ||  ||   || **D.** || 16 ||   ||

|| || || What is the equation for the axis of symmetry of the quadratic function //f(x)// = 3//x//2 + 18//x// - 10? || ||


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

|| || || 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 - 6//x// + 184 If Vincente gained $200, how long did he have his money in the mutual fund? || ||


 * ||  ||   || **A.** || 9 years ||   ||
 * ||  ||   || **B.** || 7 years ||   ||
 * || Answered Correct: ||  ||   || **C.** || 8 years ||   ||
 * ||  ||   || **D.** || 2 years ||   ||

|| || || A quadratic equation is written in 4 equivalent forms below. # y = x(x + 4) - 6(x + 4)
 * 1) y = (x - 1)2 - 25
 * 2) y = x2 - 2x - 24
 * 3) y = (x + 4)(x - 6)

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

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


 * || Answered Correct: ||  ||   || **A.** || 2 ||   ||
 * ||  ||   || **B.** || 1/8 ||   ||
 * ||  ||   || **C.** || 8 ||   ||
 * ||  ||   || **D.** || -2 ||   ||

|| || || In which direction must the graph of f(x) = x2 be shifted to produce the graph of g(x) = (x - 7)2? || ||


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

|| || || A quadratic equation is written in 4 equivalent forms below. # y = x(x - 2) - 24
 * 1) y = (x - 1)2 - 25
 * 2) y = x2 - 2x - 24
 * 3) y = (x + 4)(x - 6)

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


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

|| || || y = x2 - 2x - 24 Which of the following tables matches the equation shown above? || || **x** || **y** ||
 * 0 || -17 ||
 * 1 || -25 ||
 * 2 || -17 ||
 * 3 || -21 ||  ||   ||   || **x** || **y** ||
 * 0 || -22 ||
 * 1 || -28 ||
 * 2 || -22 ||
 * 3 || -21 ||  ||   ||   || **x** || **y** ||
 * 0 || -24 ||
 * 1 || -25 ||
 * 2 || -24 ||
 * 3 || -21 ||  ||   ||   || **x** || **y** ||
 * 0 || -24 ||
 * 1 || -25 ||
 * 2 || -24 ||
 * 3 || 27 ||  ||
 * **W** ||  || **X** ||   || **Y** ||   || **Z** ||   ||   ||


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

|| || || In which direction must the graph of f(x) = x2 be shifted to produce the graph of g(x) = x2 - 7? || ||


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

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

|| || || Dale is 3 years older than Chip. The product of their ages is 340. How old is Dale? || ||


 * || Answered Incorrect: ||  ||   || **A.** || 17 ||   ||
 * ||  ||   || **B.** || 23 ||   ||
 * ||  ||   || **C.** || 14 ||   ||
 * || Correct Answer: ||  ||   || **D.** || 20 ||   ||

|| || || Phil hit 6 more home runs than Charlie did last season. The product of their home runs from last season is 247. How many home runs did Charlie hit last season? || ||


 * ||  ||   || **A.** || 241 ||   ||
 * ||  ||   || **B.** || 19 ||   ||
 * || Answered Correct: ||  ||   || **C.** || 13 ||   ||
 * ||  ||   || **D.** || 25 ||   ||

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

|| || || y = x2 + 7x + 6 What are the x-intercepts of the graph of the equation above? || ||


 * ||  ||   || **A.** || (1, 0) and (-6, 0) ||   ||
 * || Answered Correct: ||  ||   || **B.** || (-1, 0) and (-6, 0) ||   ||
 * ||  ||   || **C.** || (1, 0) and (6, 0) ||   ||
 * ||  ||   || **D.** || (-1, 0) and (6, 0) ||   ||

|| || || y = x2 + 7x + 6 What are the x-intercepts of the graph of the equation above? || ||


 * ||  ||   || **A.** || (1, 0) and (6, 0) ||   ||
 * ||  ||   || **B.** || (1, 0) and (-6, 0) ||   ||
 * ||  ||   || **C.** || (-1, 0) and (6, 0) ||   ||
 * || Answered Correct: ||  ||   || **D.** || (-1, 0) and (-6, 0) ||   ||

|| || || If the graph of f(x) = x2 is shifted 4 units to the left, then what would be the equation of the new graph? || ||


 * || Correct Answer: ||  ||   || **A.** || g(x) = (x + 4)2 ||   ||
 * || Answered Incorrect: ||  ||   || **B.** || g(x) = x2 - 4 ||   ||
 * ||  ||   || **C.** || g(x) = (x - 4)2 ||   ||
 * ||  ||   || **D.** || g(x) = x2 + 4 ||   ||

|| || || 16x + 4 = -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.** || There is not enough information. ||   ||
 * ||  ||   || **B.** || one ||   ||
 * ||  ||   || **C.** || zero ||   ||
 * || Answered Correct: ||  ||   || **D.** || two ||   ||

|| || || y = -2x2 + 9x + 14 Will the parabola of this equation open upward or downward? || ||


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

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


 * || Answered Correct: ||  ||   || **A.** || [[image:http://media.studyisland.com/cgi-bin/mimetex.cgi?y%5C%20=%5C%20-3x%5E%7B2%7D%5C%20+%5C%207x%5C%20+%5C%2014]] ||   ||
 * ||  ||   || **B.** || [[image:http://media.studyisland.com/cgi-bin/mimetex.cgi?y%5C%20=%5C%203x%5E%7B2%7D%5C%20-%5C%207x%5C%20+%5C%2014]] ||   ||
 * ||  ||   || **C.** || [[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%207x%5C%20+%5C%2014]] ||   ||
 * ||  ||   || **D.** || [[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%207x%5C%20+%5C%2014]] ||   ||

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


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

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


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

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


 * ||  ||   || **A.** || //y// = //x2 + 2//x //- 24// ||   ||
 * || Answered Correct: ||  ||   || **B.** || //y// = //x//2 - 2//x// - 24 ||   ||
 * ||  ||   || **C.** || //y// = -2//x// - 23 ||   ||
 * ||  ||   || **D.** || //y// = //x//3 - 21 ||   ||

|| || || y = 4x2 + 9x + 14 Will the parabola of this equation open upward or downward? || ||


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

|| || || 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? || ||


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

|| || || 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 + 1? || ||


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

|| || || y = x2 + 2x - 15 What are the x-intercepts of the graph of the equation above? || ||


 * || Answered Correct: ||  ||   || **A.** || (-5, 0) and (3, 0) ||   ||
 * ||  ||   || **B.** || (5, 0) and (-3, 0) ||   ||
 * ||  ||   || **C.** || (5, 0) and (3, 0) ||   ||
 * ||  ||   || **D.** || (-5, 0) and (-3, 0) ||   ||

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


 * || A = 65 m2 ||  || //x// - 4 ||
 * //x// + 4 ||  ||

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


 * ||  ||   || **A.** || 65 m by 1 m ||   ||
 * || Answered Correct: ||  ||   || **B.** || 13 m by 5 m ||   ||
 * ||  ||   || **C.** || 9 m by 9 m ||   ||
 * ||  ||   || **D.** || 4 m by 4 m ||   ||