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N76 [4]
3 years ago
5

1. Consider a lottery with three possible outcomes:-$125 will be received with probability 0.2-$100 will be received with probab

ility 0.3-$50 will be received with probability 0.5a. What is the expected value of the lottery
Mathematics
1 answer:
Norma-Jean [14]3 years ago
3 0

Answer:

The expected value of the lottery is $80

Step-by-step explanation:

To get the expected value, we have to multiply each outcome by its probability

Then we proceed to add up all of these to get the expected value of the lottery

we have this as ;;

125(0.2) + 100(0.3) + 50(0.5)

= 25 + 30 + 25 = $80

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The graph represents the function (check picture)
Taya2010 [7]

Answer:

a = 1 and b = -12

Step-by-step explanation:

* Lets look to the graph to solve the problem

- f(x) is a rational function with:

# numerator ⇒ x² - 4x + 3

# denominator ⇒ x² + ax + b

- To find the values of a and b lets use the hole and the vertical

  asymptote in the graph of the function

∵ There is a hole at x = 3

- The hole appears when the numerator and the denominator have

 a common factor

∵ x = 3 ⇒ subtract 3 from both sides

∴ x - 3 = 0

∴ The numerator and the denominator have a factor (x - 3)

- The vertical asymptotes appear at the zeros of the denominator

  that means the values of x when the denominator = 0

∵ There is a vertical asymptote at x = -4

∵ x = -4 ⇒ add 4 for both sides

∴ x + 4 = 0

∴ The denominator has another factor (x + 4)

- The denominator x² + ax + b has two factors (x - 3) and (x + 4) lets

  multiply them to find the value of a and b

∵ (x - 3)(x + 4) = (x)(x) + (x)(4) + (-3)(x) +(-3)(4)

∴ (x - 3)(x + 4) = x² + 4x - 3x - 12 = x² + x - 12

∴ x² + ax + b = x² + x - 12

- By comparing the two sides

∴ a = 1 and b = -12

8 0
3 years ago
5th grade math. correct answer will be marked brainliest
monitta

Answer:

She got 9 multiple choice questions right.

She got 8 true/false questions right.

Step-by-step explanation:

you have to make them have a common denominator.

so multiply 4/5 by 2/2 and you get 8/10.

She got 9/10 multiple choice answers right and 8/10 true/false answers right.

5 0
3 years ago
Read 2 more answers
Can you show the steps <br> thanks .........
Andrews [41]

Answer:

40 black bears

Step-by-step explanation:

Hope it helps.

5 per sample

8 samples

5 x 8 = 40 black bears

4 0
2 years ago
Find the lcd of the pair of expressions
STALIN [3.7K]

\frac{2}{7}  {x}^{10}  {y}^{4}  \: and \:  \frac{2}{14}  {x}^{8}  {y}^{7} \\ lcd = 14 {x}^{10}   {y}^{7}
Answer is
14 {x}^{10}  {y}^{7}

When it's powered numbers, remember to choose the one with the largest power. For example,
{x}^{10}
And
{x}^{8}
Choose 10, same goes to y, where you choose 7 not 4 since 7 is larger.

Hope this helps. - M
4 0
3 years ago
Lin and Andre start walking toward each other at the same time from opposite ends of the 22-mile walking trail. Lin walks at a s
goldfiish [28.3K]

Answer:

Step-by-step explanation:

let they meet after t hours

2.5t+3t=22

5.5 t=22

55/10 t=22

t=22×10/55=4 hours

after 4 hours they meet.

8 0
3 years ago
Read 2 more answers
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