How do I do this? I am very confused.

Which pair of lines is parallel? a. y=4x+1 and y+4=5 b. y=-2+x and 2y-2x=-2 c. y=1/4x + 2 and y-2=1/2x d. y=1/5x+1 and 5y+x= 10

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

52 cm radius = diameter = area = circumference = circumfer