Answers edited by bepri

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• How do you find the vertex and intercepts for # f(x) = -9x^2 + 7x + 9#?
  
• How is the answer -2/3 and -4/3? I do not understand how this can be.
  
• How do you solve "quotient of three times a number and 4 is at least -16" and graph the solution on a number line?
  
• How do you solve #37x - 15= 38#?