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guajiro [1.7K]
3 years ago
13

Which speed is the fastest?

Mathematics
2 answers:
9966 [12]3 years ago
8 0
1/3 of an hour is 20 minutes so 20 divided by 4 is 5 minutes per 1 mile.

1/3 of a mile is 4 hours so a full mile would be 3 times 4 which is 12 so every 12 hours is 1 mile.

1/2 a mile takes 3 hours and 2 times 3 is 6 so every 6 hours is 1 mile.

A. 5 minutes per mile

B. 12 hours per mile

C. 6 hours per mile

The correct choice is A.
I hope this helped you
anyanavicka [17]3 years ago
7 0
It’s A . 4 miles in 1/3
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Which sequence shows the numbers in order from least to greatest​
jeka94

Answer:

C

Step-by-step explanation:

1/2 is positive unlike the other two so it is obviously last.

Now it's between -3/4 and -2/3

-3/4 = -0.75

-2/3 = -0.67

Since -0.75 < -0.67, -3/4 is first and -2/3 is second.

7 0
3 years ago
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What is the value of x
lesya [120]

6x-4=56

6x=56+4

6x=60  /:6

x=10°

3 0
3 years ago
NEED HELP WITH A MATH QUESTION!! WILL MARK BRAINLIEST IF CORRECT
leva [86]
4^2 + 5^2 = EK^2
16 + 25 =
41 = EK^2
EK = square root of 41

12 + 12 + square root of 41 + square root of 41 = perimeter

24 + 2(square root of 41)

About 36.8

Hope it's right
7 0
4 years ago
Let X equal the number of flips of a fair coin that are required to observe
Nataliya [291]

Answer:

(a) I attached a photo with the diagram.

(b) f(x) = \big( \frac{1}{2} \big)^{x-1}

(c) 1/4

(d) 4

(e) k^2/2

Step-by-step explanation:

(a) I attached a photo with the diagram.

(b) The easiest way to think about this part is in terms of combinatorics. Think about it like this.

To begin with, look at the three each level of the three represents a possible outcome of throwing the coin n-times. If you throw the coin 3 times at the end in total there are 8 possible outcomes. But The favorable outcomes are just 2.

 1  - Your first outcome is HEADS and all the others are different except the last one.

 2  - Your first outcome is TAILS and all the others are different except the last one.

Therefore the probability of the event is

f(x) = P(X=x) = \frac{2}{2^x}  = \frac{1}{2^{x-1}} = \big( \frac{1}{2} \big)^{x-1}

(c)

P(X = 0) = 0 because it is not possible to have two consecutive tails or heads.

E(X > 4) = 1 - P(X \leq 3) = 1 - ( P(X = 0 ) + P(X = 1) + P(X = 2) + P(X = 3))\\= 1 - ( \frac{1}{2} + \frac{1}{4} ) = \frac{1}{4}

(d)

Remember that this is a geometric distribution therefore

E[X] = p/(1-p), in this case  p = 1/2 so E[X] = 1 and

E[X+1]^2 = ( E[X] +1 )^2  = (1+1)^2 = 2^2 = 4

Also

(e)

This is a geometric distribution so its variance is

Var(X) = \frac{1-p}{p^2} = 1/2 / 1/4 = 1/2

And using properties of variance

Var(kX - k ) = Var(kX) = k^2 var(X) = k^2 /2

3 0
4 years ago
Please help with the screenshot
oksian1 [2.3K]

Answer:

x = 10.73

Step-by-step explanation:

\sin(59)  =  \frac{9.2}{x}

x =  \frac{9.2}{ \sin(59) }  = 10.73

7 0
3 years ago
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