6 pencils and 5 crayons are 32.1 inches. 7 pencils and 6 crayons are 37.8 inches. Each pencil is the same length as the other pencils, and each crayon is the same length as the other crayons. What is the length of 1 pencil? What is the length of 1 crayon?

c.

step-by-step explanation:

arc length = radius * x ( in radians)

6 * pi = 18 * x

divide by 18 on each side

6 pi / 18 = x

pi/3 = x

the angle is pi / 3 radians

or   60 degrees

x:       y:  

-1         4

0         4

1         6

2         18

3         20