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)
vs. (-1/2, -5/2), (2.5)***
D. (1/2, 5/2), (2, 5)
2.how many solutions of real numbers does the equation have 0 = -3x^2 + x – 4
a. 0***
b. 1
vs. 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***
vs. 3; 6
D. -3; 1
4. resolve. x^2 – 81 = 0
a. 0
b. -9
vs. -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
vs. exponential***
D. line
for questions 6 to 9, match the equation to the corresponding graph.
(need wedsite to know the problem)
a B cd
6. ay=-2x^2+2
7. j=-x^2
8.cy=2x^2
9. par=3x^2-4
Graph the quadratic functions y = -2x^2 and y = -2x^2 + 4 on a separate sheet of paper. Using these graphs, compare and contrast the shape and position of the graphs.
y=-2x^2+4 is only 4 units more than y=-2x^2 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
CORRESPONDING TO
6. One
7.D
8.C
9.B
10. TEST Ro is right, I got 9/9 with 3 possible points improved. Thank you Trial answer please I want to know if I am 100% correct Everything is correct I did it and got a 100% Did anyone get the essay question , but is the last one correct?
yes Gameknight is right I got a 9/9 and 3 possible points. gamenight is right 🙂 ok #1 – 4, correct
#5, can’t tell, can’t see any graphics, thank you so much everyone here!! :3 Do you have any unit test answers from Lesson 9 on Equations and Inequalities from Unit 7? There are 18 questions on part 1! Please help me i need it today!!!! Ro is 100%. thank you Ro you are a lifesaver i love you Gameknight is right. all answers are 100% correct. Thanks! Thank you very much Ro and GameKnight! real lifesavers