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Mathematics

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PLEASE HELP NO TROLLS
5. Find the measure of angle A. *

PLEASE HELP NO TROLLS 5 Find The Measure Of Angle A class=

Answer :

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30 degrees. A triangle is 180. The right angle is 90.
90=7x-10+3x
add ten to both sides and combine like terms
100=10x simplify
10=x now substitute
3x
3(10)=30

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