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Sonja [21]
3 years ago
11

What’s the answer to this

Mathematics
2 answers:
Alchen [17]3 years ago
6 0

Answer:

B

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!

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Tommy wants to buy a new bike. Tommy has $199, which is $35 less than he needs. Which equation or inequality represents the cost
malfutka [58]

Answer:

Option (d) is correct.

Step-by-step explanation:

The initial amount Tommy has = $ 199

The actual amount that Tommy needs to purchase bike = 199 + 35 = $ 234

This is the price of the bike.

This condition can be true from option (d).

From option (d)

119 < b + 35

Put b = 234 we get

119 < 234 + 35

119 < 269

Thus the condition satisfied. so option (d) is correct.

4 0
3 years ago
If a varies directly as the cube root of b and if a=3 and b=64.find the formula connecting the variables hence find b when a=15/
Liono4ka [1.6K]

Answer:

b = 125

Step-by-step explanation:

Given a varies directly as \sqrt[3]{b} then the equation relating them is

a = k\sqrt[3]{b} ← k is the constant of variation

To find k use the condition a = 3 , b = 64 , then

3 = k\sqrt[3]{64} = 4k ( divide both sides by 4 )

\frac{3}{4} = k

a = \frac{3}{4} \sqrt[3]{b} ← equation of variation

When a = \frac{15}{4} , then

\frac{15}{4} = \frac{3}{4} \sqrt[3]{b} ( multiply both sides by 4 to clear the fractions )

15 = 3\sqrt[3]{b} ( divide both sides by 3 )

5 = \sqrt[3]{b} , then

b = 5³ = 125

6 0
2 years ago
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