Can someone please explain how they got blue? With an equation.

What is the slope of a line that is perpendicular to y = 3x + 1

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

Bradley hikes 12 miles in 3 hours. in relation to bradley’s hike, which statement describes the expression