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3 years ago

Please help with problems 6 and 7

Mathematics

1 answer:

Rus_ich [418]3 years ago

8 0

So with #7 you are going to divide 24 feet by 2 feet which will give you an answer of 12 feet.

And for #6 you are going to want to put the equation set up as 15+4x=12+6x

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Please help. I’ll mark you as brainliest if correct!

OLEGan [10]

Answer:

x +0y+0z = 400

-x +y+0z = 150

-8x +0y +z = 250

Step-by-step explanation:

The last column is the solution

The rest of the columns are the coefficients of the variables

x +0y+0z = 400

-x +y+0z = 150

-8x +0y +z = 250

5 0

3 years ago

For the Data Set below, calculate the Variance to the nearest hundredth decimal place. (Do not use a coma in your answer) 175 34

dlinn [17]

Answer:

The variance of the data is 29966.3.

Step-by-step explanation:

The given data set is

175, 349, 234, 512, 638, 549, 500, 611

We need to find the variance to the nearest hundredth decimal place.

Mean of the data

$Mean=\dfrac{\sum x}{n}$

where, n is number of observation.

$Mean=\dfrac{3568}{8}=446$

The mean of the data is 446.

$Variance=\dfrac{\sum (x-mean)^2}{n-1}$

$Variance=\dfrac{(175-446)^2+(349-446)^2+(234-446)^2+(512-446)^2+(638-446)^2+(549-446)^2+(500-446)^2+(611-446)^2}{8-1}$

$Variance=\dfrac{209764}{7}$

$Variance=29966.2857$

$Variance\approx 29966.3$

Therefore, the variance of the data is 29966.3.

4 0

3 years ago

AB←→ is perpendicular to CD←→. How many 90° angles are formed by the intersection?

daser333 [38]

4. Think of a lower t, there are 4 equal angles

6 0

4 years ago

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The probability of obtaining nine heads in a row when flipping a coin is

Gelneren [198K]

Answer: The probability is about 0.2%.

The probability of flipping heads one time is 0.5, 50% or 1/2.

To flip heads 9 times in a row, we have to multiply 1/2 by itself 9 times.

(1/2)^9 = 1/512 or about 0.2%

It should only happen once every 512 times.

7 0

3 years ago

What is 7x =90+22 ?

Elanso [62]

Answer:

x=16

Step-by-step explanation:

8 0

3 years ago

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