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anzhelika [568]
3 years ago
11

Is the number written in scientific notation? If not, explain.

Mathematics
1 answer:
PilotLPTM [1.2K]3 years ago
3 0
Scientific\ notation:\ a\cdot10^n\ where\ 1\leq a \ \textless \  10\ and\ n\in\mathbb{Z}\\\\a.\ 0.15\cdot10^4-NOT,\ because\ 0.15 \ \textless \  1.\ Correct\ is\ 1.5\cdot10^3\\\\b.\ 7.06\cdot10^{-8}-YES\\\\c.\ 3.3\cdot100^1-NOT,\ because\ is\ 100,\ not\ 10.\ Correct\ is\ 3.3\cdot10^2
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3 years ago
-6x + 7y = 9<br> 2x - 2y = 4<br> Solve for x and y
Effectus [21]

Answer:

x = 23 , y = 21

Step-by-step explanation:

-6x + 7y = 9 -- (1)

2x - 2y = 4 -- (2)

(2) x 3 : 6x - 6y = 12 -- (2)'

(1) + (2)' : y = 21 -- (3)

Subtituting (3) into (2),

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According (3) and (4),

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If this helps you, please give brainliest!

7 0
3 years ago
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Answer:

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Then, add the tip.

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