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4 years ago

8m + 14 - 12 + 4n How do you combine this into likewise terms???

Mathematics

1 answer:

belka [17]4 years ago

5 0

Answer: 8m+2+4n

Step-by-step explanation:

Since there are no other terms with m or n you subtract 14 and 12 and you keep 8m and 4n. 14-12=2 so the expression is 8m+2+4n

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Find the difference. Write the answer in simplest terms. 2/3- 3/9

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Step-by-step explanation:

2/3=6/9

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3 years ago

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Henry drove 60.2 miles in 7 days how many miles did he drive in 1 day

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vichka [17]

15.

I had x before the movie.

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3 years ago

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Dimas [21]

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2 years ago

Suppose that you were not given the sample mean and sample standard deviation and instead you were given a list of data for the

Troyanec [42]

Answer:

So, the sample mean is 31.3.

So, the sample standard deviation is 6.98.

Step-by-step explanation:

We have a list of data for the speeds (in miles per hour) of the 20 vehicles. So, N=20.

We calculate the sample mean :

$\mu=\frac{19 +19 +22 +24 +25 +27 +28+ 37 +35 +30+ 37+ 36+ 39+ 40+ 43+ 30+ 31+ 36+ 33+ 35}{20}\\\\\mu=\frac{626}{20}\\\\\mu=31.3$

So, the sample mean is 31.3.

We use the formula for a sample standard deviation:

$\sigma=\sqrt{\frac{1}{N-1}\sum_{i=1}^{N}(x_i-\mu)^2}$

Now, we calculate the sum

$\sum_{i=1}^{20}(x_i-31.3)^2=(19-31.3)^2+(19-31.3)^2+(22-31.3)^2+(24-31.3)^2+(25-31.3)^2+(27-31.3)^2+(28-31.3)^2+(37-31.3)^2+(35-31.3)^2+(30-31.3)^2+(37-31.3)^2+(36-31.3)^2+(39-31.3)^2+(40-31.3)^2+(43-31.3)^2+(30-31.3)^2+(31-31.3)^2+(36-31.3)^2+(33-31.3)^2+(35-31.3)^2\\\\\sum_{i=1}^{20}(x_i-31.3})^2=926.2\\$

Therefore, we get

$\sigma=\sqrt{\frac{1}{N-1}\sum_{i=1}^{N}(x_i-\mu)^2}\\\\\sigma=\sqrt{\frac{1}{19}\cdot926.2}\\\\\sigma=6.98$

So, the sample standard deviation is 6.98.

3 0

3 years ago

8m + 14 - 12 + 4n How do you combine this into likewise terms??? ​

8m + 14 - 12 + 4n How do you combine this into likewise terms???