Chapter 3 Section 3
Systems of Inequalities
Algebra 2 Notes
January 28, 2007
Warm-Ups
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1) John has a total of 9 stamps, which consist of $0.25 and
$0.02 stamps. His stamps have a value of $1.10. How
many of each stamp does he have?
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(Hint: Use a system of equations)
2) Graph each inequality:
Solving Systems of Inequalities
Solve this system of inequalities by graphing:
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Step 1: Put both equations into y = mx + b form
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Step 2: Graph both inequalities on the same graph (using the correct line:
dotted or solid)
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Step 3: Shade in the correct direction for each individual graph
Solving More Inequalities
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Solve the following inequality by graphing:
Word Problems
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The SAT test has two parts, a verbal part and a
mathematics part.You can score a maximum total of 1600
points. For admission a particular college requires a math
score of at least 600. Write a system of inequalities that
model scores that meet the school’s requirements.
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Label your variables!!
Solve your system using your graphing calculator. What
does the feasible region represent in this equation?
Where Do You Want To Go?
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Chose a school from this list that you might think about
attending after high school. Make a system of equations and
graph it on your calculator to find all of the different
combinations of math/verbal scores you could earn on the
SAT to be accepted.
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CSU: Average Reading score of 610
Texas A & M:Average Math score of 660
Michigan State:Average Reading score of 630
Arizona State:Average Math score of 620
Harvard University:Average Math score of 790
Solving a Linear/Absolute Value System

Graph the following two system of inequalities to find the
solution.
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What’s different about these systems?
Homework #14
 Pg
136 #4, 5, 7, 8, 10, 11, 30-39,
47, 53-55
3.1-3.3 Quiz on Friday!