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3 years ago

Divide. Write your answer in simplest form. 6/7 ÷ 5/21

1 answer:

5 0

The answer is 8/5.
To divide fractions, flip the second fraction and multiply.
For example,
= 6/7 • 21/5
= 126/35
Simplify by dividing both sides by 7 to get your answer.
= 8/5

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3x+2/2=13 please help me find the anwser

goldenfox [79]

Answer:

x=4

Step-by-step explanation:

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2 years ago

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Find the volume of the pyramid. 100 points

KATRIN_1 [288]

120 yd^3

Step-by-step explanation:

The formula for the volume of a pyramid is...

$V=\frac{1}{3}Bh$

B is the area of the base and h is the height from the middle of the pyramid to the top. Since we know both of these we can plug them in.

$V=\frac{1}{3}(45*8)$

$V=\frac{1}{3}*360$

$V=$

120

The volume for the pyramid is 120 yd^3.

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2 years ago

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1 Find the value of C to that the function probability density function defined as follow, also calculate the man and variance /

Viefleur [7K]

Answer:

$c = \frac{1}{12}$

The mean of the distribution is 0.25.

The variance of the distribution is of 0.6875.

Step-by-step explanation:

Probability density function:

For it to be a probability function, the sum of the probabilities must be 1. The probabilities are 3c, 3c and 6c, so:

$3c + 3c + 6c = 1$

$12c = 1$

$c = \frac{1}{12}$

So the probability distribution is:

$P(X = -1) = 3c = 3\frac{1}{12} = \frac{1}{4} = 0.25$

$P(X = 0) = 3c = 3\frac{1}{12} = \frac{1}{4} = 0.25$

$P(X = 1) = 6c = 6\frac{1}{12} = \frac{1}{2} = 0.5$

Mean:

Sum of each outcome multiplied by its probability. So

$E(X) = -1(0.25) + 0(0.25) + 1(0.5) = -0.25 + 0.5 = 0.25$

The mean of the distribution is 0.25.

Variance:

Sum of the difference squared between each value and the mean, multiplied by its probability. So

$V^2(X) = 0.25(-1-0.25)^2 + 0.25(0 - 0.25)^2 + 0.5(1 - 0.25)^2 = 0.6875$

The variance of the distribution is of 0.6875.

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2 years ago

75 POINTS AND I'LL GIVE BRAINLIEST!!!

Slav-nsk [51]

Answer:

Step-by-step explanation:

area of the square =10*10=100

area of the circle =pi r^2=pi*1^2=3.142

part a

p(hitting the circle =3.142/100=0.03142 Which is closer to 0

part b

p( hitting the white portion ) =1-0.03142=0.96858 which is closer to 1

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1 year ago

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1. Use the figure below to answer the questions. (a) Solve for x.

hram777 [196]

Answer:205

Step-by-step explanation:This is an hexogon so you would do

720-118-112-131-154

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2 years ago

Divide. Write your answer in simplest form. 6/7 ÷ 5/21​

Divide. Write your answer in simplest form. 6/7 ÷ 5/21