Answer:
-15
Step-by-step explanation:
Order of Operations: BPEMDAS
1. Brackets
2. Parenthesis
3. Exponents
4. Multiplication
5. Division
6. Addition
7. Subtraction
Left to Right
Step 1: Write expression
3² - 3 · [(5² - 9) ÷ 2]
Step 2: Brackets Parenthesis Exponents
3² - 3 · [(25 - 9) ÷ 2]
Step 3: Brackets Parenthesis Subtraction
3² - 3 · [16 ÷ 2]
Step 4: Brackets Division
3² - 3 · 8
Step 5: Exponents
9 - 3 · 8
Step 6: Multiplication
9 - 24
Step 7: Subtraction
3^2 - 3 x [(5^2 - 9) / 2 ]
9 - 3 x [(25 - 9) / 2]
9 - 3 x (16/2)
9 - 3 x 8
<em>5x + 1</em>
f(x) = 3x + 2
g(x) = - 2x + 1
<em>f(x) - g(x)</em> = 3x + 2 - ( - 2x + 1 ) = 3x + 2 + 2x - 1 = <em>5x + 1</em>
24x^2
25 km
