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2 years ago

What’s the difference between (-2.23) - (-97.2)?

Mathematics

2 answers:

mylen [45]2 years ago

6 0

Step-by-step explanation:

(-2.23) - (-97.2)

1. Formula:

(a) - (-b) = a + b, because -(-) change to a positive (+).

-2.23 + 97.2

2. Simplify

= 94.97 <------ Answer

Hope this Helped!!!

~Shane

Otrada [13]2 years ago

4 0

Answer:

-2.23-(-97.2)=94.97

Step-by-step explanation:

just subtract

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For this case we have the following distribution given:

X 1 2 7

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We need to begin finding the mean with this formula:

$E(X) = \sum_{i=1}^n X_i P(X_i)$

And replacing we got:

$E(X) =1 *\frac{1}{5} +2 *\frac{2}{5} +7*\frac{2}{5}= 3.8$

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And replacing we got:

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And the deviation would be:

$Sd(X) =\sqrt{6.96}= 2.638$

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