Answers edited by Pallu

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• -30/5x-25 added to 4x-5/x-5?
  
• How do you simplify #\frac { 9\times 10^ { - 9} } { 2.4\times 10^ { 8} }#?
  
• Question #94454
  
• Question #a5d20
  
• Factor completely?
  
• Question #6725f
  
• If x2-8x-1=0 then prove that x2+1/x2 ?
  
• Question #e3826
  
• How do you solve for #x# in # \frac { 9} { w + 8} = \frac { x } { ( w - 7) ( w + 8) }#?
  
• Two students walk in the same direction along a straight path, at a speed-one at 0.90 m/s and the other at 1.90 m/s. Assuming that they start at the same point and the same time, how much sooner does the faster student arrive at a destination 780 m away?
  
• How do you solve #2+ z \times - \frac { 1} { 3} = 3#?
  
• How do you combine #\frac { 1} { x - 3} + \frac { 1} { ( x - 3) ^ { 2} } - \frac { 1} { ( x - 3) ^ { 3} }# into one term?
  
• What percent of 17.5 is 12?
  
• Question #507e9
  
• AND gate is formed by using two? 1)OR 2)NAND 3)NOT 4)NOR
  
• If r varies inversely as t, but directly as the square of m. if r=32 when m=8 and t=2, find r when m=6 and t=5?
  
• Question #f53ce
  
• Question #6078b
  
• A stone is thrown vertically up from the tower of height 25m with a speed of 20m/s time taken to reach the ground?