Ch 5 Quiz

How can you tell if a point is a solution to a system?

• It makes the first equation true.
• The (x,y) coordinates satisfy both equations
• It makes logical sense
• It makes neither equation negative

^{What is the solution?} 

• 1
• -2
• (1, 2)
• (1, -1)

This system has _____ solutions

• 0
• 1
• 2
• Infinitely many

When you graph the exact same equation twice,

• you will have no solution. 
• you will have one solution.
• you will have infinite solutions. 
• you will graph a giraffe. 

What is the solution to this system of equations?
 $y=x-2$  
 $y=-2x+1$  

• (1, -1)

• (-1, 1)

• (0, -2)

• (2, 0)

Solve by Substitution

• Infinite number of solutions

• (0, 7)

• (-5, -7)

• (5, 7)

Solve by Substitution

• (-3, -8)

• (-8, 3)

• (2, 3)

• (-8, -6)

Solve by elimination:
4x+9y=28
-4x-y=-28

• (-7,0)
• (6,0)
• (-6,0)
• (7,0)

Solve by elimination:
4x+4y=4

3x+4y=10

• (7,-6)
• (-6,7)
• (6,7)
• (7,6)

Which graph best represents the following inequality?

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• 
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•