Answer:
x = 3
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Equality Properties
Step-by-step explanation:
<u>Step 1: Define Equation</u>
4x + 9 = 2x + 15
<u>Step 2: Solve for </u><em><u>x</u></em>
- Subtract 2x on both sides: 2x + 9 = 15
- Subtract 9 on both sides: 2x = 6
- Divide 2 on both sides: x = 3
<u>Step 3: Check</u>
<em>Plug in x into the original equation to verify it's a solution.</em>
- Substitute in <em>x</em>: 4(3) + 9 = 2(3) + 15
- Multiply: 12 + 9 = 6 + 15
- Add: 21 = 21
Here we see that 21 does indeed equal 21.
∴ x = 3 is the solution to the equation.
The formula for the volume of a sphere is:
V = 4/3 * PI * r^3
The diameter is given as 21.6, divide this by 2 for the radius:
R = 21.6 / 2 = 10.8
V = 4/3 * PI * 10.8^3
V = 5276.7 cm^3
The answer is D
Answer:
Please refer to the image
Step-by-step explanation:
A kilogram is equal to a thousand grams, so 1.3 kg is 1300 grams.
1300 - 700 = 600.
