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4 years ago

What is 7/12 divided by 14/15 in simplest form

Mathematics

1 answer:

gulaghasi [49]4 years ago

6 0

7/12 divided by 14/15 is the same as 7/12 x 15/14 cross cancel and multiply 5/8 is the answer hope this helps

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Find the variance of the following data. Round your answer to one decimal place. x 1 2 3 4 5 P(X=x) 0.3 0.2 0.2 0.1 0.2

Reptile [31]

The variance of a distribution is the square of the standard deviation

The variance of the data is 2.2

<h3>How to calculate the variance</h3>

Start by calculating the expected value using:

$E(x) = \sum x* P(x)$

So, we have:

$E(x) = 1 * 0.3 + 2* 0.2 +3 * 0.2 + 4 * 0.1 + 5 * 0.2$

This gives

$E(x) = 2.7$

Next, calculate E(x^2) using:

$E(x^2) = \sum x^2* P(x)$

So, we have:

$E(x^2) = 1^2 * 0.3 + 2^2* 0.2 +3^2 * 0.2 + 4^2 * 0.1 + 5^2 * 0.2$

$E(x^2) = 9.5$

The variance is then calculated as:

$Var(x) = E(x^2) - (E(x))^2$

So, we have:

$Var(x) = 9.5 - 2.7^2$

$Var(x) = 2.21$

Approximate

$Var(x) = 2.2$

Hence, the variance of the data is 2.2

Read more about variance at:

brainly.com/question/15858152

4 0

2 years ago

Ба + 9 = За + 12<br><br>pls help me

jeka57 [31]

Answer:

a=1

Step-by-step explanation:

Subtract 9 on both sides

Subtract 3a on both sides

Then divide both sides by 3

4 0

3 years ago

Read 2 more answers

Find (5d2 +8d + 1) - (2d? + 3d - 1).<br> (542 +8d + 1) - (2d2 + 3d-1) =

Kruka [31]

Answer:

282

Step-by-step explanation:

3 0

4 years ago

Solve by elimination: <br> x+y=5 <br> 3x + y= -11<br><br><br><br> Please explain the steps!!!

Firlakuza [10]

Answer: x = -8, y = 13

Step-by-step explanation:

x+y=5

3x+y=-11

now subtract the two equations

x-3x+y-y=5-(-11)

-2x=16, x = -8

now substitute

-8 + y = 5, y = 13

7 0

2 years ago

Read 2 more answers

Find the length of each arc. Round your answer to the nearest tenth

Sauron [17]

Answer:

52 yd

Step-by-step explanation:

The formula for arc length is s = rФ, where r is the radius and Ф is the central angle in radians.

Here the central angle is 300° and the radius is 10 yd.

Convert 300° to radians:

π rad

Multiply 300° by the conversion factor ------------

180°

obtaining

(300/180)π = 5.2 rad

Then the arc length is s = rФ = (10 yd)(5.2 rad) = 52 yd

6 0

3 years ago