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PSYCHO15rus [73]
2 years ago
8

Please help! Solve the following:

Mathematics
1 answer:
mihalych1998 [28]2 years ago
4 0

Answer:

n=10.

Step-by-step explanation:

\frac{45}{n^{2}-3n-4 } - \frac{3}{n-4} = \frac{2}{n+1 }

\frac{45}{n^{2}-3n-4 } -  \frac{3(n+1)}{(n+1)(n-4)} = \frac{2(n-4)}{(n+1)(n-4) }

\frac{45}{n^{2}-3n-4 } -  \frac{3n+3}{n^{2} -3x-4} = \frac{2n-8}{n^{2} -3x-4 }

45-3n-3=2n-8

45-3+8=5n

n=50/5=10

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If you divide 926 by 4 you will get 231.5

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Round 6.7086 to the nearest thousandth
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3 years ago
Item 10 Find the amount of time. I=$450, P=$2400, r=7.5%
Alex787 [66]
The answer is:  "2.5 years" . 
___________________________________________________
  Note:   I = P * r * t  ;    { " Interest = Principal * rate * time "} ; 

          →     Solve for "t" {"time", in years} ;  

Divide each side of the equation by "{P * r}"  ;  
   to isolate "t" on one side of the equation ;

→  I / (P * r)  = {P * r * t) / (P * r} ; 

to get:  " I / (P * r) = t " ;  

  ↔  t = I / (P * r) ; 

Given:  I = $450 ;  
  
            <span>P = $2400 ; 

            r = 7.5% = 7.5/100 = 0.075 ; 

Plug in these values into the formula to solve for the time, "t" :

        </span>→  t  =  I  /  (P  *  r )   ;  

                 =  $450  /   (<span>$2400 * 0.075) ;

                 =  </span>$450  /   ($2400 * 0.075) ;

                 =  $450 / $180 ; 

                 =  $45 / $18 ; 

                 =  ($45 ÷ 9) / ($18 ÷ 9) 

                 =  $5 / $2 ; 

                 =  2.5  ; 

        →  t  =  2.5 years.
_______________________________________________________
The answer is:  "2.5 years" . 
_______________________________________________________
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