3 - (7a + 1) =
3 - 7a - 1 =
-7a + 2 <===
The answer is 520 millimeters
Answer:
the triangle is an isosceles triangle.
Step-by-step explanation:
Answer:

Step By Step Explanation:
Follow PEMDAS Order Of Operations
Calculate Within Parenthesis: 

Calculate Exponents: 

Divide: 

Add

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