What’s the answer to this

Mathematics

2 answers:

Alchen [17]3 years ago

6 0

Answer:

Step-by-step explanation:

I solved in the picture

Hope this helps ^-^

stepan [7]3 years ago

5 0

Answer:X=2, and -36

Step-by-step explanation:

Ehh

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1. A weighted coin is biased so that a head is twice as likely to occur as a tail. If the coin is tossed 4 times, what is the pr

ohaa [14]

Answer:

80/81

Step-by-step explanation:

If a head is twice as likely to occur as a tail, then the probability of getting heads is 2/3 and the probability of getting tails is 1/3.

The probability of getting at least 1 head involves 4 scenarios:

1) 1 Head and 3 Tails

2) 2 Heads and 2 Tails

3) 3 Heads and 1 Tail

4) 4 Heads

Instead of calculate all these scenarios, you could calculate the opposite scenario: 4 Tails. The sum of all possible scenarios is 1, so:

P(at least one head) + P(no heads) = 1

Then, P(at least one head) = 1 - P(no heads)

The probability of 4 tails is:

P(no heads) = P(TTTT) = (1/3)(1/3)(1/3)(1/3)=1/81

Then, P(at least one head) = 1 - 1/81=80/81

7 0

3 years ago

Use two unit multipliers to convert 20 inches to miles

jarptica [38.1K]

Answer:

Step-by-step explanation:

I answered another one of your questions so I will not explain as much. ther are 12 inches in a foot and then 5280 feet in a mile so that's 1 ft/ 12 in and 1 mi/ 5280 ft. So the math is 20 in * 1 ft/ 12 in * 1 mi/ 5280 ft = .000315 mi.

In reference to the last one, do keep in mind "square" inches and whatnot mean you square things. so 1 ft/ 12 in becomes 1 ft^2/ 144 in^2. Just as a small heads up to what could be tricky.

6 0

3 years ago

Determine the missing side lengths

svetlana [45]

Answer:

Given that is a 45-45 triangle, the hypotenuse should be <em>x</em> $\sqrt{2}$ , so in this case. The hypotenuse should be 3 $\sqrt{2}$ , and the other side lengths 3. I see no other way of it going other than that one; I hope I helped at least a bit!