Answer:
40.00
Step-by-step explanation:
Answer:

General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
<u>Algebra I</u>
- Standard Form: ax² + bx + c = 0
- Quadratic Formula:

Step-by-step explanation:
<u>Step 1: Define</u>
<em>Identify variables</em>
x² - 7x - 8
↓
<em>a</em> = 1, <em>b </em>= -7, <em>c</em> = -8
<u>Step 2: Solve for </u><em><u>x</u></em>
- Substitute in variables [Quadratic Formula]:

- [√Radical] Evaluate exponents:

- [√Radical] Multiply:

- [√Radical] Add:

- [√Radical] Evaluate:

- Multiply:

- Add/Subtract:

- Divide:

Answer:
4 times the square root of 6 (4
)
Step-by-step explanation:
Use a factor tree
-2.5 because a positives opposite is a negative.