1. Systems of Equations and Inequalities
ECA Review

2. Concept

3. Concept

4. Concept

5. Lines a and b at right form a system of equations
Lines a and b at right form a system of equations. Write the equations of the lines and find the exact point of intersection.
y = – x + 1
y = 5/2 x + 3
Review 1

6. Find the point where the graphs of the equations intersect.
Check your answer.
(4,1)
Review 2

7. Review 3 The lines are parallel The lines are the same line
Complete each sentence.
A system of two linear equations has no solution if . . .
A system of two linear equations has infinitely many solutions if . . .
A system of two linear equations has exactly one solution if . . .
The lines are parallel
The lines are the same line
The lines intersect
Review 3

8. Write a system of inequalities to describe this shaded area.4

9. Solve the system of equalities
(4, – 1)
Review 5

10. Write a system of inequalities to describe the shaded area of the graph. In the inequalities, express the slopes of the lines in fraction form.
Review 6

11. Solve the system of equations
Review 7

12. Solve the system of equations
Review 8

13. Solve the system of equations
Review 9

14. Solve the system of equations
Review 10

15. Solve the system of equations
Review 11

16. Solve the system of equations
Review 12

17. Solve the system of equations
Review 13

18. Solve the system of equations
Review 14

19. Solve the system of equations
Review 15

20. Solve the system of equations
Review 16

21. Graph
Review 17

22. Graph
Review 18

23. Graph
Review 19

24. Graph
Review 20

25. Graph
Review 21

26. Graph
Review 22

27. Write a system of inequalities for the solution shown on the graph
Review 23

28. Write a system of inequalities for the solution shown on the graph
Review 24

29. Write a system of inequalities for the solution shown on the graph
Review 25