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Alex_Xolod [135]
1 year ago
10

In a class of 27 students, 14 play an instrument and 16 play a sport. There are 6

Mathematics
1 answer:
antiseptic1488 [7]1 year ago
6 0

Answer: 1/3

Step-by-step explanation:

6 + 16 + 14 - 27 = 1/3

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Brett earned scores of 74, 90, and 84 on his first three quizzes this term. What score
kozerog [31]

Answer:

x ≥ 92

Step-by-step explanation:

let 'x' = necessary score

(74 + 90 + 84 + x) / 4 ≥ 85

(248 + x) / 4 ≥ 85

cross-multiply:

248 + x ≥ 340

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4 0
3 years ago
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Solve the system of equations 5x+9y+9z=5 4x+9y+6z=10 2x+2y+5z=9
erma4kov [3.2K]

Answer:

{x,y,z} = {-116,28,37}

Step-by-step explanation:

// Solve equation [3] for the variable  z  

 

 [3]    5z = -2x - 2y + 9

 [3]    z = -2x/5 - 2y/5 + 9/5

__________________________________________________________

// Plug this in for variable  z  in equation [1]

  [1]    5x + 9y + 9•(-2x/5-2y/5+9/5) = 5

  [1]    7x/5 + 27y/5 = -56/5

  [1]    7x + 27y = -56

__________________________________________________________

// Plug this in for variable  z  in equation [2]

  [2]    4x + 9y + 6•(-2x/5-2y/5+9/5) = 10

  [2]    8x/5 + 33y/5 = -4/5

  [2]    8x + 33y = -4

__________________________________________________________

// Solve equation [2] for the variable  y  

 

 [2]    33y = -8x - 4

 [2]    y = -8x/33 - 4/33

__________________________________________________________

// Plug this in for variable  y  in equation [1]

  [1]    7x + 27•(-8x/33-4/33) = -56

  [1]    5x/11 = -580/11

  [1]    5x = -580

__________________________________________________________

// Solve equation [1] for the variable  x  

  [1]    5x = - 580  

  [1]    x = - 116

__________________________________________________________

// By now we know this much :

   x = -116

   y = -8x/33-4/33

   z = -2x/5-2y/5+9/5

__________________________________________________________

// Use the  x  value to solve for  y  

   y = -(8/33)(-116)-4/33 = 28

__________________________________________________________  

// Use the  x  and  y  values to solve for  z  

 z = -(2/5)(-116)-(2/5)(28)+9/5 = 37

╦────────────────────────────╦

│Hope this helped  _____________________│    

│~Derelis ____________________________ │

╨___________________________________╨                  

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3 years ago
Can someone help me Write an equation for this graph?
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Y=2/3x-1 is the equation:)
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Benjamin writes an expression for the sum of 1 cubed, 2 cubed and 3 cubed. What is the value at the expression
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Step-by-step explanation:

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299.87

Step-by-step explanation:

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6 0
1 year ago
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