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Pepsi [2]
4 years ago
11

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

3 + i) + (18 + 5i)?
Mathematics
1 answer:
madam [21]4 years ago
4 0
The first step of simplifying the expression would be summing up the "i"s. They are separate ("+i" and "+5i") but you can still sum them up though they are apart. This is thanks to the commutative property of addition which allows summing the terms of an expression with several additions in whatever order it is prefered. Commutative means that the terms can be interchangeable. 
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jolli1 [7]

Answer:

14a² - 3b² + 4b

Step-by-step explanation:

Like terms are the terms that have similar stuff on it, like same variables, no variables, and stuff like that.

4a2-3b2+ 4b + 10a2

4a² and 10a² is similar. 4a² + 10a² = 14a²

Now, the equation is 14a² - 3b² + 4b. There is no more like terms left, so that is the answer.

Hope this helps!!

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Answer:

x=17

Step-by-step explanation:

Since the triangles are congruent, the angles are equal

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Subtract 4 from each side

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4x= 68

Divide by 4

4x/4 = 68/4

x = 17


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Step-by-step explanation:

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