Answer:
its A :)
Step-by-step explanation:
Answer:
x = -50
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Equality Properties
- Multiplication Property of Equality
- Division Property of Equality
- Addition Property of Equality
- Subtraction Property of Equality<u>
</u>
<u>Algebra I</u>
Step-by-step explanation:
<u>Step 1: Define</u>
-2/5x - 2 = 18
<u>Step 2: Solve for </u><em><u>x</u></em>
- [Addition Property of Equality] Add 2 on both sides: -2/5x = 20
- [Division Property of Equality] Divide -2/5 on both sides: x = -50
The formula to find the interior angles is :
(n-2)×180°
Wheras n=the number of sides.
Angles sum of 25-gon therefore will be:
(25-2)×180°
=4140°
Thus,4140° is the answer.
Hope it helps!
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D and 3, sorry if wrong hahaha