Unit 7 Test Review: Linear Systems of Equations

What is the solution?

• (1, -1)

• (-1, 1)

• (0, -2)

• (1, 1)

How many solutions does this system of equations have?

• One Solution
• No solution
• Infinitely Many Solutions
• Two Solutions

Tags

CCSS.HSA.REI.C.6

CCSS.HSA.REI.D.10

CCSS.HSA.REI.D.11

Solve for x and y using substitution.

3x + 2y = 16

7x + y = 19

• (-2,5)

• (-2,-5)

• (2,-5)

• (2,5)

If a system of linear equations has one solution, what does this mean about the two lines?

• Parallel lines

• the same line

• Intersecting lines at a point (x, y)

Which of the following are ways to solve systems of linear equations?

• Graphing

• Substitution

• Elimination

• All of the above

Solve using elimination OR substitution.

• (5, -2)

• (5, 8)

• (3, 0)

• (-5, 8)

If you are using substitution to solve, what would be the best variable to solve the starred equation for?

• the top x

• the top y

• the bottom x

• the bottom y

If a system of linear equations has infinite solutions, what does this mean about the two lines?

• parallel lines

• the same line

• lines intersecting at one point (x, y)

Would it be best to solve the following system with substitution OR elimination?

-2x + 5y = 10

3x + 7y = 2

• substitution

• elimination

Solve for x:

-11x = 0

• x = 0

• x = undefined