Answer:
I've done this before my friend...
Answer:
c.
Step-by-step explanation:

radius of custom made version=4×5=20 inches
When two terms are directly next two each other, they are being multiplied.
The answer is 5n
Answer:
r = 1
Step-by-step explanation:
Step 1: Write equation
-3r + 18 = 15r
Step 2: Solve for <em>r</em>
- Add 3r to both sides: 18 = 18r
- Divide both sides by 18: 1 = r
- Rewrite: r = 1
Step 3: Check
<em>Plug in r to verify it's a solution.</em>
-3(1) + 18 = 15(1)
-3 + 18 = 15
15 = 15