**Answer:**

pi times d

**Step-by-step explanation:the actuall formula is 2 pi r but since the radius times 2 is the diameer its pi times d hope this helps god bless**

It would be A as 5 x-intercept

**Answer:**

(-3, 3)

**General Formulas and Concepts:**

<u>Pre-Algebra</u>

- Order of Operations:
**BPEMDAS** - Equality Properties

<u>Algebra I</u>

- Solving systems of equations using substitution/elimination

**Step-by-step explanation:**

<u>Step 1: Define systems</u>

-5x - y = 12

y = -4x - 9

<u>Step 2: Solve for </u><em><u>x</u></em>

<em>Substitution</em>

- Substitute in <em>y</em>: -5x - (-4x - 9) = 12
- Distribute negative: -5x + 4x + 9 = 12
- Combine like terms: -x + 9 = 12
- Subtract 9 on both sides: -x = 3
- Divide -1 on both sides: x = -3

<u>Step 3: Solve for </u><em><u>y</u></em>

- Define original equation: y = -4x - 9
- Substitute in <em>x</em>: y = -4(-3) - 9
- Multiply: y = 12 - 9
- Subtract: y = 3