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HELP PLEASE ITS ABOUT PROOFS IM DESPERATE

HELP PLEASE ITS ABOUT PROOFS IM DESPERATE-example-1
User Markstewie
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1 Answer

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26 votes

Answer:

B) Subtraction Property of Equality

Explanation:

In step 8, it says 77 degrees + m<C = 90 degrees. Then in step 9, it is simplified to m<C = 13 degrees... but how did we get there? Well, if you subtract 77 from 90, you get 13. So, it would be the subtraction property of equality since we had to subtract 77 on both sides to isolate m<C. Hope that helps, I'm 100% sure on this one :)

User Mark Maruska
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