Answers edited by Kartik M.

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• How many acute angles does a parallelogram have?
  
• How would you solve the system of these two linear equations: #2x + 3y = -1# and #x - 2y = 3#? Enter your solution as an ordered pair (x,y).
  
• In rhombus #ABCD#, the length, in inches of #AB# is #3x + 2# and #BC# is #x + 12#. Wha tis the number of inches in the length of #DC#?