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Viefleur [7K]
4 years ago
10

Arlene us showing her work in simplifying(−7.9)+8.2−3.4+2.1 identify any error in her work or in her reasoning.

Mathematics
1 answer:
Brums [2.3K]4 years ago
4 0
Keep doing each step manually, and see where it slips up: −7.9+8.2−3.4+2.1=−1 −7.9+8.2+(−3.4)+2.1=−1 −7.9+(−3.4)+8.2+2.1=−1 (−7.9+(−3.4))+(8.2+2.1)=−1 −11.3+10.3=−1

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Fiesta28 [93]
We have that

<span>0.1x+0.5y=0.6
0.4x-1.2y=-5.6

using  a graph tool
see the attached figure

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the answer is
the coordinate x of the solution is x=-6.5

</span>

4 0
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Alecsey [184]

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5 0
3 years ago
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irina1246 [14]

Answer:

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4 0
3 years ago
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Alik [6]
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3 0
3 years ago
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