Answers edited by Aron S.

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• What is the period and amplitude for #y=3 cos x#?
  
• What is the Square root of 20 - square root of 45 + 2 square root of 125?
  
• How do you simplify 6(square root of 2) + 10(square root of 8)?
  
• How do you simplify #sqrt100 - sqrt130 + sqrt130 - sqrt169#?
  
• How do you simplify the square root of 40 + the square root of 90?
  
• I have $3.85 in my pocket in dimes and quarters only. I have three times as many dimes in my pocket as I do quarters. How many of each type of coin do I have?
  
• A square has an area of 196 cm2, what is the perimeter of the square?
  
• What is 4 square root of 80?
  
• How do you solve the inequality #-2k-2>10#?
  
• How do you graph #y=2cos3x#?
  
• How do you simplify #sqrtxsqrt(x+2)#?
  
• How do you find all zeros of #F(x)= x^3 -8x^2 +25x -26#?