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irina [24]
4 years ago
14

There are two coins in a bag. for coin 1, p(h) = ½ and for coin 2, p(h) = 1/3. your friend chooses one of the coins at random an

d tosses it 5 times.
a. what is the probability of observing at least 3 heads?
b. you ask your friend: “did you observe at least 3 heads?”. your friend replies, “yes”. what is the probability that coin 2 has been chosen?
Mathematics
1 answer:
lana [24]4 years ago
8 0
The answer is 3 to this question
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Andrew is two years older than Beatrice, and Chris is three years younger than Beatrice. The product of Andrew's age and Chris'
stich3 [128]

Answer:

9

Step-by-step explanation:

A = B + 2

C = B - 3

A x C = 66

A = Andrew

C = Chris

B = Beatrice

Multiply A and c together

(B + 2) x (b - 3)

b^2 - 3b + 2b - 6

b^2 -b - 6 = 66

b^2 - b - 72 = 0

factors of -72b^2 that add up to - b are -9b + 8b

b^2 + 8b -9b - 72

b (b + 8) -9(b + 8)

b = 9 or - 8

b = 9

5 0
3 years ago
Joe has saved $30. He earns $7.50 per hour at his job. He plans to buy a plane ticket to Florida for $300. Enter the minimum num
ruslelena [56]

Answer:

30 hours

Step-by-step explanation:

300 - 30

270/7.5

8 0
2 years ago
16-z=12 solve equation​
sammy [17]

z=4

16-4=12

esta es la respuesta

7 0
3 years ago
NO LINKS!! Please help me​
Tatiana [17]

Answer:

A

Step-by-step explanation:

Since cosine is positive and sine is negative that puts θ in Quad IV.

From right triangles we know:

Cos θ = adjacent/hypotenuse = 5/13

sin θ = opposite/hypotenuse = ?/13

To find the opposite side across from θ use the pythagorean theorem.

5² + y² = 13²

25 + y² = 169

y² = 144

y = 12

we are given  that sin is < 0 so sinθ = -12/13

6 0
2 years ago
Read 2 more answers
Can anyone explain this to me??
sergejj [24]
The answer is the last one. Except for the first one, the questions are asking which two line segments are congruent (or equal to each other) in the triangle. Hope this helps :3<span />
4 0
3 years ago
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