Precalc ch 7 s2 final review

find: B*A

• 47     30
  9     5
• 17     15
  42     35
• 10     25
  7     1
• not possible because rows do not match columns

Tags

CCSS.HSN.VM.C.8

Find the Inverse

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• 
• 
• 

What is the inverse of the following matrix?

⌈4 −3⌉

⌊12 3⌋

• ⌈1∕16 1∕16⌉

  ⌊−⁶∕₁₉ ²∕₁₉⌋

• ⌈⁴∕48 −³∕48⌉

  ⌊¹²∕48 ³∕48⌋

• ⌈²∕₁₉ −³∕48⌉

  ⌊−⁶∕₁₉ ³∕48⌋

• ⌈³∕48 ³∕38⌉

  ⌊−¹²∕48 ⁴∕48⌋

Simplify. 

• A
• B
• C
• D

When two lines have the same slope and the same y-intercept...

• The system is inconsistent
• The system is consistent independent
• The lines are parallel to each other and never meet
• The system is consistent dependent

When two lines end up being the same line which statement is FALSE

• The system is inconsistent
• The lines have the same slope
• The lines have the same y-intercept
• All of the points in the line are a solution to the system

What step should be next?

• Mult. R3 by 0
• Add R2 to R3
•  Mult. R2 by 7 and add to R3
•  Mult. R2 by -7 and add to R3

Tags

CCSS.8.EE.C.8B

What step should be next?

• Mult. R2 by -3
• Mult. R2 by 1/3
• Mult. R2 by -7 and R3 by 3
• Add R3 to R2

Tags

CCSS.HSA.REI.C.5

CCSS.HSA.REI.C.6

CCSS.HSA.REI.C.8