Asked by Gameknight

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

Answers

Answered by Reiny
#1 - 4, correct
#5, can't tell , can't see any graph
Answered by Gameknight
is the last one correct
Answered by Reiny
y=-2x^2+4 is just 4 units up from y=-2x^2 ?

yes
Answered by Anonymous
100% All Correct Just Did it and got a 100%
Answered by yeet lord
gamenight is right :) all right
Answered by Ro
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
Answered by Ro is 100% right
Ro is right I got 9/9 with upgraded 3 possible points. Thank you
Answered by Ro
You're welcome!
Answered by Bella
Gameknight is right i got a 9/9 and 3 possible points.
Answered by meow
thanks SOOOO much everyone here!! :3
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!!!!
Answered by who's Joe
Ro is 100%. thanks Ro your a life saver love you
Answered by Jason W.
Gameknight is correct. all the answers are 100% accurate. Thank you!
Answered by High on Chesecake
Thanks so much Ro and GameKnight! True lifesavers
Answered by IloveCassianandAzriel
Anyone got the essay question tho
Answered by BiKU777
Essay answer please i wanna know if im right
Answer
Ro is wrong 9 is not b it’s d y=3x^2-4
Answered by Joonsconversehigh
My teacher is pretty strict with grading so I don’t know if this is 100% right but I’m taking the quiz now, for question number 10 I put the parabolas have the same shapes opening downwards with vertex’s of (0, 0) for number one and (0, 4 )for number two, the second equation is shifting up by four units with a maximum vertex
Answered by Bot
at (0, 4) compared to the first equation.

This answer is correct. The two parabolas have the same shape and axis of symmetry, but the second parabola has been vertically translated upwards by 4 units, resulting in a vertex at (0, 4) instead of (0, 0). The second parabola also has a maximum point since it opens downwards, and this maximum point occurs at the vertex.

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