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Vesnalui [34]
3 years ago
7

Factor mn - 4m - 5n + 20

Mathematics
2 answers:
anastassius [24]3 years ago
4 0
Mn - 4m - 5n + 20

In this, mn and -4m have a common factor; m. So we can take that out to make it:

m(n-4) -5n + 20

Now, -5n + 20 also has a common factor which is 5, because 20/5 gives you 4, and 5/5 equals 1. So we can talk out that -5 (it doesn't need to be negative, but negatives on variable, no gusta). So you'd get

m(n-4)-5(n-4)      OR m(n-4)+5(-n+4)
quester [9]3 years ago
3 0

Answer:

We have to factor the expression

=mn-4m-5n+20

=m*(n-4)-5*(n-4)

Taking (n-4), common between these two terms

=(m-5)(n-4)

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Answer:

Mean = 30516.67

Standard deviation, s = 3996.55

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Step-by-step explanation:

Given the data:

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Mean, xbar = Σx / n = 366200 /12 = 30516.67

Standard deviation, s = [√Σ(x - xbar) / n-1]

Using calculator, s = 3996.55

The ZSCORE = (x - mean) / s/√n

Zscore = (27000 - 30516.67) / (3996.55/√12)

Zscore = - 3516.67 / 1153.7046

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2 years ago
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Answer:

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3 years ago
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Answer:

probability of x is 0.22 correct to two decimal places

Step-by-step explanation:

step 1. use the poisson formula given as

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On a farm there are three-legged-cows and chickens. There are total of 127 heads and 353 legs. How many three-legged-cows are on
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Answer: There are 99 three-legged-cows  and 28 chickens.

Step-by-step explanation:

Let x be the number of three-legged-cows and y be the number of chickens.

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The according to the question, we have the following equations :-

\text{For heads }x+y=127------(1)\\\\\text{For legs }3x+2y=353------(2)

Multiplying 2 to the equation (1), we get

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Hence, there are 99 three-legged-cows  and 28 chickens.

6 0
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