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3 years ago

12

Which expression demonstrates the use lf the commutative property of addition in the first step of simplifying the expression (-

1+i) + (21+5i)?

2 answers:

Sloan [31]3 years ago

5 0

Answer:

It’s C

Step-by-step explanation:

dangina [55]3 years ago

4 0

Commutative property of addition is

a+b = b+a, that is if we change the positions of the numbers, the result is same. For e.g. 2 + 3 = 3+2 .

In the given question , which is (-1+i) + (21+5i), we can use commutative property of addition to simplify it to the simpler form .

And the first step is to combine the like terms that is

(-1+21)+(i+5i). And tht's the required answer or that's the first step which is the commutative property of addition .

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4 years ago

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dsp73

Answer:

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Step-by-step explanation:

Given (Omitted from the question)

$Red = 7$

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Solving (a): $P(First\ White\ and\ Second\ Blue)$

This is calculated using:

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$P(First\ White\ and\ Second\ Blue) = \frac{n(White)}{Total} * \frac{n(Blue)}{Total - 1}$

<em>We used Total - 1 because it is a probability without replacement</em>

So, we have:

$P(First\ White\ and\ Second\ Blue) = \frac{9}{21} * \frac{5}{21 - 1}$

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$P(First\ White\ and\ Second\ Blue) = \frac{9*5}{21*20}$

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