Answer:

Step-by-step explanation:
Hi there!

Replace all x's with a-1:

I hope this helps!
Circumference: 2 * pi * r
pi = 3.14, r = 4
2 * 3.14 * 4 = 25.12
Circumference: 25.12 cm
Area = pi * r^2
pi = 3.14, r = 4
3.14 * 4^2 = 50.24
Area: 50.24 cm^2
They are made by 1. 4 is made by 2, 8 is made by 2 and 4, 6 is made by 2 and 3.
Answer:
9x 2 equals 18. 72 divided by 18 is 4. So the answer is 4.
Step-by-step explanation: