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pishuonlain [190]
2 years ago
15

At a raffle, 1500 tickets are sold at $2 each for four prizes of $500, $250, $150 and $65. You buy two tickets. What is the expe

cted value of your gain?
Mathematics
1 answer:
Ulleksa [173]2 years ago
3 0

This can be solve by just knowing what is amount that is going to be yours and the amount that you will need to give for the prize. So the expected value of your gain is

[$2/ ticket (1500 tickets)] – ( $500 + $250 + 150 + $650) = $2035 is the expected gain

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( – 1, – 5) 7x+2y=13, 4x+4y=14
serious [3.7K]

Answer:

{x,y} = {6/5,23/10}

Step-by-step explanation:

 [1]    7x + 2y = 13

  [2]    4x + 4y = 14  <---------- linear equations given

Graphic Representation of the Equations : PICTURE
2y + 7x = 13        4y + 4x = 14  

Solve by Substitution :

// Solve equation [2] for the variable  y

[2]    4y = -4x + 14

[2]    y = -x + 7/2

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

  [1]    7x + 2•(-x +7/2) = 13

  [1]    5x = 6

// Solve equation [1] for the variable  x

  [1]    5x = 6

  [1]    x = 6/5

// By now we know this much :

   x = 6/5

   y = -x+7/2

// Use the  x  value to solve for  y

   y = -(6/5)+7/2 = 23/10

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

 [1]    7x + 2•(-x +7/2) = 13

  [1]    5x = 6

// Solve equation [1] for the variable  x

 [1]    5x = 6

[1]    x = 6/5

// By now we know this much :

   x = 6/5

   y = -x+7/2

// Use the  x  value to solve for  y

  y = -(6/5)+7/2 = 23/10

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2/7 of a chance of it not occurring 
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Step-by-step explanation:

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3 years ago
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The ratio of the lengths of two adjacent sides of a rectangle is 1/5. If it's perminiter is 24 then how wide is the rectangle
Mars2501 [29]

Width(w): 1x

Length (L): 5x

Perimeter = 2L + 2w

           24 = 2(5x) + 2(1x)

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Answer: width = 2

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