Answer:
8
Step-by-step explanation:
(10-4)+20/20
6+20/10
6+2
8
Intersect at where x=x and y=y
see where they have the same x and y values
that is at x=-1 and y=-5
intersect at (-1,-5)
3
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>Geometry</u>
Volume of a Sphere Formula: 
Step-by-step explanation:
<u>Step 1: Define</u>
<em>Identify variables</em>
<em>r</em> = 8 ft
<u>Step 2: Find Volume</u>
- Substitute in variables [Volume of a Sphere Formula]:

- Evaluate exponents:

- Multiply:

- Estimate:
