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Mathematics, 11.10.2020 02:01 samanthaurso1
Arlene is showing her work in simplifying β7.9 + 8.2 β 3.4 + 2.1. Identify any errors in her work or in her reasoning. Write feedback to Arlene explaining the mistake she made and how to correct her work.
Step Work Reasoning
β7.9 + 8.2 β 3.4 + 2.1 Original problem
1 β7.9 + 8.2 + (β3.4) + 2.1 Additive inverse
2 β7.9 + (β3.4) + 8.2 + 2.1 Associative property
3 (β7.9 + (β3.4)) + (8.2 + 2.1) Commutative property
4 β11.3 + 10.3 Simplify
5 β1 Simplify
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Arlene is showing her work in simplifying β7.9 + 8.2 β 3.4 + 2.1. Identify any errors in her work or...
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