Math

Lesson 8: Systems of Linear and Quadratic Equations
Check my work
1. Solve the system of equations.
y = 2x^2 - 3
y = 3x - 1
a. no solution
b. (-1/2, 5), (2, -5/2)
c. (-1/2, -5/2), (2,5)***
d. (1/2, 5/2), (2, 5)
2.how many real number solutions does the equation have 0 = -3x^2 + x - 4
a. 0***
b. 1
c. 2
d. 3
3. solve the equation by completing the square. If necessary round to the nearest hundredth.
x^2 - 18x = 19
a. 1; 19
b. -1; 19***
c. 3; 6
d. -3; 1
4. solve. x^2 - 81 = 0
a. 0
b. -9
c. -9, 9***
d. 9
5. which model is most appropriate for the data shown in the graph below? (need wedsite to know the problem)
a. quadratic
b. linear
c. exponential***
d. line
for questions 6-9, match the equation to its corresponding graph.
(need wedsite to know the problem)
a, b, c, d
6. a y=-2x^2+2
7. d y=-x^2
8. c y=2x^2
9. b y=3x^2-4
Graph the quadratic functions y = -2x^2 and y = -2x^2 + 4 on a separate piece of paper. Using those graphs, compare and contrast the shape and position of the graphs.

y=-2x^2+4 is just 4 units up from y=-2x^2

  1. 👍 4
  2. 👎 0
  3. 👁 1,530
  1. #1 - 4, correct
    #5, can't tell , can't see any graph

  2. is the last one correct

    1. 👍 1
    2. 👎 0
  3. y=-2x^2+4 is just 4 units up from y=-2x^2 ?

    yes

  4. 100% All Correct Just Did it and got a 100%

    1. 👍 1
    2. 👎 0
  5. gamenight is right :) all right

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    2. 👎 0
  6. Here are the correct answers;
    1. C (-1/2, -5/2), (2,5)
    2. A 0
    3. B -1;19
    4. C -9,9
    5. C Exponential
    MATCHING
    6. A
    7. D
    8. C
    9. B
    10. ESSAY

    1. 👍 9
    2. 👎 0
  7. Ro is right I got 9/9 with upgraded 3 possible points. Thank you

    1. 👍 5
    2. 👎 0
  8. You're welcome!

    1. 👍 2
    2. 👎 0

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