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navik [9.2K]
3 years ago
15

Each student in a class plays one of three sports soccer, volleyball or basketball. 1/4 of them play soccer. 3/5 of them play vo

lleyball. How many of them play basketball ?
Mathematics
1 answer:
Setler79 [48]3 years ago
7 0

Answer: 3/20 of the class

Step-by-step explanation:

Add the amount of students that play soccer to amount of students that play volleyball

1/4 + 3/5 = 17/20

Subtract 17/20 (soccer and volley ball) from 20/20 or 1

20/20 - 17/20 = 3/20

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Step-by-step explanation:

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What values of x make the equation x2 + 9x – 22 = 0 true? Check all that apply. –11 –2 0 2 11
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Answer:  x = 2 ;  -11 .
___________________________________
Explanation:
_____________________________________________
Given the equation:
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  x² + 9x −<span> 22 = 0  ;  Solve for:  "x" ;
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Let us factor the "left-hand side" of the equation:
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  "x</span>² + 9x −<span> 22"  ;
_____________________________________________

What are the factors of "-22"" that add up to "positive 9" ?
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  Let us list the factors of "-22" :
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-2, 11;  </span>→ -2 + 11 = 9 ;<span>
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So we have:  "-2" and "11" ;
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So;   </span>  "x² + 9x − 22" ; factors into " (x−2)(x + 11)" ;
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We have:  (x−2)(x + 11) = 0 ;

So:  x − 2 = 0 ;  

Add "2" to each side of the equation; 

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   x + 11 = 0 ;

Subtract "11" from each side of the equation;

   x + 11 − 11 = 0 − 11 ;

      x = -11 ; 
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 Answer:  x = 2 ; -11 .
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B . ( 2 x 2 x 7 ) + ( 2 x 3 x 8 )
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