We spent a little more time today working on writing and graphing line equations. The main emphasis was how to graph two equations on the same grid to determine a common solution for both lines. This is the point of intersection and two lines are referred to as a system of linear equations. We solved this system by graphing, and then we also reviewed how to solve it using algebra only. This is not a new skill, as we have used it several times throughout the year. The students then got started on their chapter 13 review sheet.
Assignment: Chapter 13 Review Sheet
Review Sheet Answers
1. 5 radical 5
2. (x - 5)2 + y2 = 121
3. radius = 13; (x + 2)2 + + 4)2 = 169
4. -11/2
5. 0
6. (7, 2)
7. (-2, -1/2)
8. center (-2, 4); radius = 7
9. center (0 , -6); radius = 3
10. B = (-3, 9)
11. graph on axes
12. m = -1
13. m = 1
14. perpendicular lines due to slopes being opposite reciprocals
15. both diagonals have the same midpoint; (3/2, 1/2)
16. a. graph of vector on the axes
b. (7, -13)
c. radical 218 or 14.8
17. (6, -2)
18. (-27, 54)
19. (-1, -5)
20. graph of y = 2/3 x - 4
21. horizontal line of y = -4
22. y = -3/2 x + 4
23. y = 5/6 x + 5
24. y = 2x - 1; slope was calculated to be m = 2
25. y = -3/2 x - 2
26. y = 1/2 x + 7
27. coordinates used for rectangle were (0, 0); (6, 0); (0, 4); (6, 4)
distance formula used for each diagonal; length of each diagonal was radical 52
No comments:
Post a Comment