8.4k views
20 votes
Help me pleaseeeeeeeeeeeeeeeeeeeeee

Help me pleaseeeeeeeeeeeeeeeeeeeeee-example-1

1 Answer

14 votes

Answer:

A

Explanation:


s=(a+b+c)/(2)

multiply both sides by 2


2s = a + b +c

substract b and c from both sides to get a by itself


a = 2s - (b + c)\\a = 2s - b - c

so the answer is A.

User DennisLi
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