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ludmilkaskok [199]
3 years ago
9

The probability that mary will win a game is 0.04, so the probability that she will not win is 0.96. if mary wins, she will be g

iven $200; if she loses, she must pay $14. if x = amount of money mary wins (or loses), what is the expected value of x? (round your answer to the nearest cent.)
Mathematics
1 answer:
frosja888 [35]3 years ago
8 0
Let
EV----------> <span>expected value
</span>
we know that

EV = (Probability of Winning)*(Value of Winning) + (Probability of Losing)*(Value of Losing)
so
EV=0.04*(200)+0.96*(-14)-----> EV=8+(-13.44)-----> EV=-$5.44
So
she expects to lose $5.44 every time she plays (this is on average)

the answer is
-$5.44
<span>

</span>
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Determine the discriminant for the given equation x^2+4x+5=0. Then describe the roots(how many and what type).
Fed [463]

Discriminant = b^2 - 4ac, where a, b and c come from the form of the quadratic equation as ax^2 + bx + c

Discriminant = (4)^2 - 4(1)(5)
= 16 - 20
= -4

-4 < 0, therefor there are no roots

(If the discriminant = 0, then there is one root
If the discriminant > 0, there are two roots, and if it is a perfect square (eg. 4, 9, 16, etc.) then there are two rational roots
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3 years ago
Please choose answer choice a,b,c or d
dmitriy555 [2]

Answer:

A. -4

Step-by-step explanation:

Slope is rise over run, or y2-y1 / x2-x1.

\frac{y2-y1}{x2-x1} = \frac{-4-8}{2--1} =\frac{-12}{3} = -4

<u>The slope is A. -4.</u>

Let's see--does that make sense? A slope of four would be pretty steep, and that matches the graph. It also should be negative because the line goes down and to the right, not up and to the right, so -4 makes sense!

4 0
3 years ago
326482745445-453637+938464846-3845+784657
dmitriy555 [2]
The answer is going to be <span>327421537466</span>
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3 years ago
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Sam
Oksi-84 [34.3K]

Answer:

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Step-by-step explanation:

you get this by taking 315 and mutiply it by 0.6 and get 189

4 0
3 years ago
What is the prime factor of 8
ExtremeBDS [4]
Prime factor is a factor that is a prime number.
Prime factors of :
8 : 2 × 2 × 2. Also can be written as
{2}^{3}
12 : 2 × 2 × 3. Also can be written as
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20 : 2 × 2 × 5. Also can be written as
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30 : 2 × 3 × 5

56 : 2 × 2 × 2 ×7. Also can be written as
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70 : 2 × 5 × 7

You can find all of them by using Factor Tree [ as shown in the picture] or Dividing by prime numbers.

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3 years ago
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