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zheka24 [161]
2 years ago
11

Simplify the expression: 1+–4+–7+7k2+8k

Mathematics
2 answers:
liubo4ka [24]2 years ago
6 0
1-4-7+7k^2+8k
-10+7k^2+8k
lidiya [134]2 years ago
4 0

-8+15k is the simplified expression form

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g In American roulette, the wheel has the 38 numbers, 00, 0, 1, 2, ..., 34, 35, and 36, marked on equally spaced slots. If a pla
earnstyle [38]

Answer:

The expected value for the player to play one time is -$0.05.

Step-by-step explanation:

The expected value of a random variable <em>X</em> is given by the formula:

E(X)=\sum x\cdot P(X)

The American roulette wheel has the 38 numbers, {i = 00, 0, 1, 2, ..., 34, 35, and 36}, marked on equally spaced slots.

The probability that the ball stops on any of these 38 numbers is same, i.e.

P (X = i) = \frac{1}{38}.

It is provided that a a player bets $1 on a number.

If the player wins, the player keeps the dollar and receives an additional $35.

And if the player losses, the dollar is lost too.

So, the probability distribution is as follows:

<em>     X </em>: $35      -$1

P (<em>X</em>) :   \frac{1}{38}         \frac{37}{38}  

Compute the expected value of the game as follows:

E(X)=\sum x\cdot P(X)

         =[\$35\times \frac{1}{38}]+[-\$1\times \frac{37}{38}]\\\\=\frac{\$35-\$37}{38}\\\\=-\frac{\$2}{38}\\\\=-\frac{1}{19}\\\\=-0.052632\\\\\approx -\$0.05

Thus, the expected value for the player to play one time is -$0.05.

7 0
3 years ago
The distance between the two points pictured is d = Vn
icang [17]

Answer:

  • n = 61

Step-by-step explanation:

<u>Given points:</u>

  • (-3, -2) and (2, 4)

<u>Use distance formula:</u>

  • d =  \sqrt{(2 - (-3))^2 + (4 - (-2)^2} = \sqrt{5^2 + 6^2} = \sqrt{25 + 36} = \sqrt{61}
  • n = 61
7 0
2 years ago
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