Which equation represents a proportional relationship between the x and y values?

a. y + 4 = 3x

b. y – 3x = 0

c. y + 5x = 6

d. y + 1/4x = 2

Simplify 5 square root of 7 end root plus 12 square root of 6 end root minus 10 square root of 7 end root minus 5 square root of 6 . (1 point) 5 square root of 14 end root minus 7 square root of 12 5 square root of 7 end root minus 7 square root of 6 7 square root of 12 end root minus 5 square root of 14 7 square root of 6 end root minus 5 square root of 7

Can someone tell me if this is perpendicular? !

Reagan lives five miles farther from school than vanessa lives. write an expression to describe how far reagan lives from school