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sveta [45]
3 years ago
15

Tanya is considering playing a game at the fair. There are three different ones to choose from, and

Mathematics
2 answers:
Dahasolnce [82]3 years ago
8 0

a) What is the expected value for playing each game?

Game a) -1.90

Game b) 0.05

Game c) -1.00

b) If Tanya decides she will play the game, which game should she choose? Explain.

Game b because it has the highest value

Brilliant_brown [7]3 years ago
3 0

Answer: i was just about to ask this question!

Step-by-step explanation:

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3 years ago
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Completing the square follows the principle of taking a x^{2} +bx+c and converting it into (x+ \frac{b}{2})^2+d where d is the 'correctional number' as I like to call it - i.e. the number that converts the expanded bracket into the +c, since the expanded bracket will give us a x^{2} +b.

In this case, 2/2=1 so we have the first part: (w+1)^2.
Expanding this gives us w^2+2w+1. We need c to be 9, so we can just add 8.
Putting this together:

w^2+2w+9=(w+1)^2+8

Now we can solve it more easily.
Rearranging:
(w+1)^2=-8 \\ w+1= +-\sqrt{-8} = +-\sqrt{8}i=+-2 \sqrt{2}i   \\ \boxed{w=-1+ 2\sqrt{2}i\ or\ -1-2 \sqrt{2}i  }
5 0
3 years ago
What whole number equals 5
Hoochie [10]
5 equals the whole number 5?
5 0
3 years ago
Read 2 more answers
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