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Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Explain step-by-step how to simplify -5(2x – 3y + 6z – 10).

Match the following reasons with the statements given to create the proof. 1. do = ob, ao = oc sas 2. doc = aob given 3. triangle cod congruent to triangle aob vertical angles are equal. 4. 1 = 2, ab = dc if two sides = and ||, then a parallelogram. 5. ab||dc if alternate interior angles =, then lines parallel. 6. abcd is a parallelogram cpcte