Step-by-step explanation:

Answer:
The correct option is 1. The circumference of circle is 12π units.
Step-by-step explanation:
From the given figure it is clear that the radius of the circle is6 units.
The circumference of a circle is

Where, r is the radius of the circle.
The circumference of the circle is


The circumference of circle is 12π units.
Therefore option 1 is correct.
Subsitution
solve for y in first equation
add 2x to both sides
y=2x+8
sub 2x+8 for y in second equation
16+4x=2(2x+8)
divide both sides by 2
8+2x=2x+8
true
there are infinite solutions for x
therefor infinite soltions for y
there are an infinite number of solutions
I believe the answer is 142.09
Answer:
20
Step-by-step explanation:
(6x3=18) (6x1/3=2) (18+2=20)