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Yuliya22 [10]
2 years ago
9

-x-4(x-2) Help please

Mathematics
1 answer:
Keith_Richards [23]2 years ago
7 0

Answer:

-5x+8

Step-by-step explanation:

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A math class is having a discussion on how to determine if the expressions 4x-x+5 and 8-3x-3 are equivalent using substitution.
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Okay. In my opinion, all the class has to do is simplify the expressions and compare. But they want to substitute instead.

Well then.

First, let's notice that these are linear expressions, meaning that if they are equivalent then all their values match up.

Number 1 is not a good one. Just because they're both positive doesn't mean anything; they have to be <em>the same.</em>

This also eliminates 3.

Number 2 is a good one, but it's not as reliable. If, for instance, the two expressions are <em>not </em>equivalent and you get lucky enough to pick that one value they intersect at (or have in common), then you'd be wrong when you say they are equivalent.

Number 4 makes the most sense because if both expressions are equivalent, then every value matches up. If not, then only one will. So having two values to substitute will most definitely answer the class question.

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2 years ago
2357111317 what is the next number
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Find the circumference of the figure.
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Answer:

About 23.9 in

Step-by-step explanation:

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