Question

(10 POINTS) Given the following formula, Solve for a.

Answer 1

Answer:

C. a = 2s - b - c

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

1. Brackets
2. Parenthesis
3. Exponents
4. Multiplication
5. Division
6. Addition
7. Subtraction

• Left to Right

Equality Properties

• Multiplication Property of Equality
• Division Property of Equality
• Addition Property of Equality
• Subtract Property of Equality

Step-by-step explanation:

Step 1: Define

$\displaystyle s = \frac{a + b + c}{2}$

Step 2: Solve for a

1. Multiply 2 on both sides:                     $\displaystyle 2s = a + b + c$
2. Subtract b on both sides:                    $\displaystyle 2s - b= a + c$
3. Subtract c on both sides:                    $\displaystyle 2s - b - c = a$
4. Rewrite:                                                $\displaystyle a = 2s - b - c$