Answers edited by E P.

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• A=1/2(x+y) make x the subject?
  
• How do you find the product of #(x-3)^2#?
  
• What is the measure of one angle of a regular 12-sided polygon?
  
• How do you solve the following system?: #9y = -3x - 9 , 5x + 3y = -3 #
  
• What equation means that 7 less than twice a number is -1?
  
• How do you solve #3.3w + 5 = 23#?
  
• How do you solve #4x - 63= 9x + 57#?
  
• How do you solve the following linear system: #3x + 5y = -1, 2x − 5y = 16#?
  
• Anne invested $1000 in an account with a 1.3% annual intrest rate. She made no deposit or withdrawls on the account for 2 years. If intrest was compounded annually, which equation represents the balance in the account after the 2 years?
  
• How do you find the axis of symmetry and vertex point of the function: #y= -4x^2+24x+6#?
  
• How do you complete the square for #3x^2 +18x + 5#?