# 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)
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

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1. #1 - 4, correct
#5, can't tell , can't see any graph

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Reiny
2. is the last one correct

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

yes

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

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5. gamenight is right :) all right

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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

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7. Ro is right I got 9/9 with upgraded 3 possible points. Thank you

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8. You're welcome!

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9. Gameknight is right i got a 9/9 and 3 possible points.

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10. thanks SOOOO much everyone here!! :3

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11. Any answers on Unit 7 lesson 9 Equations and Inequalities unit tests? There is 18 questions on part 1! Please help me I need it today!!!!

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12. Ro is 100%. thanks Ro your a life saver love you

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13. Gameknight is correct. all the answers are 100% accurate. Thank you!

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14. Thanks so much Ro and GameKnight! True lifesavers

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15. Anyone got the essay question tho

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