The circumference A of a circle varies directly with its radius. A circle with a radius of 4 has a circumference of about 25.1 in.2. What would be the circumference of a circle with a radius of 9 in.?

answer:

c 60% on edg

x= cost per bracelet

number of bracelets * x + shipping charge = total cost

so

9x+9=72

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)