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There is an exam worth 145 with 50 questions. Some questions are worth 2 points and some are worth 5 points, how many two point questions are on the test?

 Feb 28, 2020
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Let  x be the  number  of  2 point questions

Then there  must  be  (50 - x)  5 point questions

 

So....we have  this equation

 

2x  + 5(50 -x)    =  145          simplify

 

2x + 250  - 5x   = 145

 

-3x  + 250  =  145            subtract 250 from each sides

 

-3x  =  -105      divide both sides by  -3

 

x  =  35   = number of 2 point questions

 

cool cool cool

 Feb 28, 2020

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