Review the following concepts if needed:
 Systems of Equations Help
 Applications of Systems of Equations Help
 Systems of Inequalities Help
 Graphical Solution to System of Equations Help
Systems of Equations and Inequalities Practice Test
Directions: In some of the following problems, you will be asked to find quantities such as x + 2 y for a system of equations. Solve the system and put the solution in the formula. For example, if the solution is x = 3 and y = 5, then x + 2 y becomes 3 + 2(5) = 13.
Practice

Find x + 2 y for the system.
(a) −2
(b) −1
(c) 1
(d) 2

Find x + 2 y for the system.
(a) 8
(b) 9
(c) 10
(d) 11

Find x + y for the system.
(a) 4
(b) 5
(c) 6
(d) 7

Find x + y for the system.
(a) 2 and 14
(b) 3 and 12
(c) 4 and 20
(d) 5 and 15

The graph in Figure 10.43 is the graph of which inequality?
Fig. 10.43
(a) y > 2 x + 2
(b) y ≥ 2 x + 2
(c) y ≤ 2 x + 2
(d) y < 2 x + 2

The graph in Figure 10.44 is the graph of which inequality?
Fig. 10.44
(a) y > x ^{2} − 2 x + 1
(b) y ≥ x ^{2} − 2 x + 1
(c) y ≤ x ^{2} − 2 x + 1
(d) y < x ^{2} − 2 x + 1

The graph in Figure 10.45 is the graph for which system?
Fig. 10.45

The graph in Figure 10.46 is the graph of which system?
Fig. 10.46
Solutions
 A
 B
 C
 C
 D
 B
 B
 D
 PreCalculus: Systems of Equations and Inequalities
 PreCalculus: The Slope and Equation of a Line
 PreCalculus: Introduction to Functions
 PreCalculus: Functions and their Graphs
 PreCalculus: Combinations of Functions and Inverse Functions
 PreCalculus: Quadratic Functions
 PreCalculus: Polynomial Functions
Ask a Question
Have questions about this article or topic? AskRelated Questions
See More QuestionsPopular Articles
 Kindergarten Sight Words List
 First Grade Sight Words List
 Child Development Theories
 10 Fun Activities for Children with Autism
 Social Cognitive Theory
 Why is Play Important? Social and Emotional Development, Physical Development, Creative Development
 Signs Your Child Might Have Asperger's Syndrome
 Theories of Learning
 A Teacher's Guide to Differentiating Instruction
 Definitions of Social Studies