Alg. 1 - Ch. 7 Test

What is the first step in solving a system by Substitution?

• Make sure both equations are in standard form.
• Make sure at least one equation is solved for one variable.
• Make sure both equations are in slope-intercept form.
• Make sure both equations can be solved.

If a system of equations has no solution, what does the graph look like? 

• intersecting lines
• parallel lines
• skew lines
• intersecting lines

What is the best method for solving this system of equations?

x = -3y - 8

x - 2y = -3

• Substitution

• Elimination

• Graphing

• Dunking

What is the best method to solve this system of equations?

5x - 4y = 11

5x + 4y = -14

• Graphing

• Substitution

• Elimination

• Connection

What is the best way to solve this system?

y = ¹/₄ x + 2

y = ⁷/₄ x - 4

• Elimination

• Substituion

• Graphing

• Pairing

Solve:
y = -1x - 5
4x - 8y = 4

• (-3, -2)
• (5, -7)
• (3, 9)
• (-5, 4)

Solve:
y = 7x + 9
2y + 2x = -18

• (5, 0)
• (9, 18)
• (-2, -5)
• (1, 16)

Lesly graphed two lines in order to find the solution to a given system of equations.
What is the solution?

• (-3,-8)
• (-8,-3)
• (3,-8)
• (8,3)

What is the solution to the system?

• (0, 3)
• (1, -1)
• (-3, 1)
• (1, 3)

Find the solution to the system below. 
3x + y = 19
2x - y = 6

• No solution
• (4, 5)
• (5, 4)
• (14, 5)