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$1.00 problem solving

  • From Mathematics: Algebra
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  • Due on Mar. 02, 2010
  • Asked on Jan 30, 2010 at 9:17:54PM
Asked by :
azura
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Q:

Solve the problem.  Jim has goten scores of 68 and 72 on his first two tests.  What score must he get on his third test to keep an average of 75 or greater?

 

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$0.50
Your answer please 100% correct!
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  • Posted on Jan 30, 2010 at 9:23:53PM
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vb68
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A:
Preview: ... 8+72+x)/3 >=75 68 ...
The full tutorial is about 17 words long .
 
$1.00
The Correct Answer With Work Shown
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  • Posted on Jan 30, 2010 at 9:33:53PM
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ken5000
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A:
Preview: ... which must be 75 or greater: (x + 68 + 72)/3 ≥ 75 Multiply both sides by 3. 3(x + 68 + 72)/3 ≥ ...
The full tutorial is about 108 words long .
 
$1.00
Score-correct step by step solution
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  • Posted on Jan 30, 2010 at 9:53:42PM
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mdld
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A:
Preview: ... 72 x)/3 Average > 75 means (68 72 x)/3 > 75 Solve for x (68 72 x)/3 > 75 Multiply both sides ...
The full tutorial is about 85 words long .
 
$0.25
correct answer
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  • Posted on Feb 04, 2010 at 11:27:43PM
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nnareshj
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A:
Preview: ... st  marks so (68+72+x)/3>=75     (140+x)/ ...
The full tutorial is about 29 words long .
 
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ANSWER TO TEST AVG
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  • Posted on Feb 08, 2010 at 5:52:11PM
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me43560
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A:
Preview: ... 5 = 225 225 - ( ...
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Choose me! :D answer+explanation
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  • Posted on Feb 20, 2010 at 3:20:41PM
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skutner
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A:
Preview: ... ast test result by x. Then, the average score will be ...
The full tutorial is about 43 words long .