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  1. ...3) Let the quarters be x 0.25x + 0.10( 15 -x ) = 2.25 0.25x + 1.50 - 0.10x = 2.25 0.15x = 0.75 x = 5 ANSWER 5 quarters and...

    2 Answers · Science & Mathematics · 09/10/2013

  2. ...also 400 the same way x-1 + x+1 is also 400 do you see the pattern? There's a simple enough equation created by not sure if t was John Napier, his teacher asked him...

    3 Answers · Science & Mathematics · 01/08/2013

  3. ...system of equations a: Let Sam's age be S , and John's age J , Therefore J=3S That means...

    2 Answers · Science & Mathematics · 22/11/2012

  4. 1) Let the no of programs he bought be x Total amount spent = 1.50x $ Sold = ( x-30) Sale price = 4$ each Total sales = ( x-30)*4 = 4x - 120 $ (4x- 120) - 1.50x = 30 2.5x - 120 = 30 2.5x = 150 x = 150/2.5 = 60 programs...

    2 Answers · Science & Mathematics · 18/10/2012

  5. ...someone must have assigned them to you. bully of who-so-ever has done that... q16. the approach speeds will be sum of speeds. sum = 430...

    2 Answers · Science & Mathematics · 18/05/2012

  6. ...subtract $3.15, the amount they didn't spend. The parking was 7 * 1.50 = $10.50, so before that they had $13.65. This is what they...

    1 Answers · Science & Mathematics · 16/04/2013

  7. ..., if the adult tickets are 10.90 or 10.25, 6.50 each would make more sense, but the wording does not say each, it says $6.50 for two, so there's room to argue. Here's my answer: start at...

    3 Answers · Science & Mathematics · 15/05/2012

  8. Youre really pretty

    3 Answers · Science & Mathematics · 14/10/2012

  9. 1. x² − 2x − 8 > 7 x² − 2x − 15 > 0 (x+3)(x−5) > 0 Draw a U-shaped quadratic curve and mark the x-intercepts −3 and 5. Since quadratic > 0, note the parts of the curve above the x-axis. x<−3 or x>5 2...

    2 Answers · Science & Mathematics · 28/04/2012

  10. ...the time it take JOE to type a paper by himself in minutes 1/50 + 1/x = 1/30 1/x = 1/30 - 1/50 1/x = (5 - 3)/150 1/x = 2/150 x = 75 ...

    2 Answers · Science & Mathematics · 10/04/2012

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