Decide if the following pair of lives are parallel, perpendicular, coincidental, or neither. y + 3x = -3 and x - 3y = 9.
A neither
B. parallel
C. perpendicular
O D. coincidental

Acentral angle measuring 160 degrees intercepts an arc in a circle whose radius is 4. what is the length of the arc the circle formed by this central angle? round the length of the arc to the nearest hundredth of a unit. a) 4.19 units b) 6.28 units c) 12.57 units d) 12.57 square units