Question

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

Answer 1

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

Answer 2

is the last one correct

Answer 3

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

yes

Answer 4

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

Answer 5

gamenight is right :) all right

Answer 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

Answer 7

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

Answer 8

You're welcome!

Answer 9

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

Answer 10

thanks SOOOO much everyone here!! :3

Answer 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!!!!

Answer 12

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

Answer 13

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

Answer 14

Thanks so much Ro and GameKnight! True lifesavers

Answer 15

Anyone got the essay question tho

Answer 16

Essay answer please i wanna know if im right

Answer 17

Ro is wrong 9 is not b it’s d y=3x^2-4

Answer 18

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