Answers created by Alisal

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• Are the sex chromosomes present only in sex cells or in the somatic cells as well?
  
• How do you solve #\frac { x - 4} { x ^ { 2} } = \frac { 1} { x ^ { 2} } - 1#?
  
• What is the square root of 28?
  
• What is the exact value of #cos (( 7\pi)/4)#?
  
• What is #-sqrt(196/81)#?