TEKS.MATH.8.9A

What is the definition of infinite solutions?

• no matter what constant is substituted in for the variable, the equation is ALWAYS true
• no matter what constant is substituted in for the variable, the equation will NEVER be true
• only this ONE solution will make the equation true

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TEKS.MATH.8.9A

How many solutions does this equation have?  3x + 2 = 3x + 2

• One Solution
• No Solution
• Infinite Solutions

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TEKS.MATH.8.9A

Josh is thinking of two numbers.  Their sum is -10 and their difference is -2.  Which system of equations represents the situation?

• x - y = -10
  x + y = -2
• x = -2 
  y = 5
• x + y = -2
  x - y = -10
• x + y = -10
  x - y = -2

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TEKS.MATH.8.9A

What is the solution?

• (6, 3)
• (3, 6)
• (-6, 3)
• No solution

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TEKS.MATH.7.7A

TEKS.MATH.8.9A

What is the y-intercept of the line graphed below?

• 3
• 4
• -3
• 4/3

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TEKS.MATH.8.9A

Edwin bought 3 cd's and 7 dvd's for $80.  Jessica bought 6 cd's and 3 dvd's for $63.75.  Which system of equations could be used to determine how much one cd and one dvd costs?

• 3x + 7y = 80
  6x + 3y = 63.75
• 3x + 3y = 80
  6x + 7y = 63.75
• 3x + 7y = 63.75
  6x + 3y = 80
• 6x + 7y = 80
  3x + 3y = 63.75

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TEKS.MATH.8.9A

Solve the system of Equation (x,y)

x + 4y = –3

x + 7y = –12

• (-3,9)

• (9,-3)

• (3,9)

• (9,3)

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TEKS.MATH.8.9A

Which graph shows the correct line for the table?

• 
• 
• 

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TEKS.MATH.8.9A

Solve the system

-2x + 2y = 9

y = 2x + 6

• ( -2/3, -3 )

• ( -3/2 , 3 )

• ( 1/2, 3 )

• ( -3/2, -3 )

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TEKS.MATH.8.9A

Solve the system by elimination. 
−4x − 4y = 0
4x + 4y = 0 

• (−6, −4) 
• Infinite number of solutions  
• (−6, 10) 
• (6, 4) 

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TEKS.MATH.8.9A