Which equation is Perpendicular to y=3x−7 and goes through the point (9, -1)

y = −13x+2

y =−13x+1

y = −13x+3

y = −13x+4

A)a square brown tarp has a square green patch green in the corner the side length of the tarp is (x + 8) and the side length of the patch is x what is the area of the brown part of the tarpb)a square red placemat has a gold square in the corner the side length of the gold square is (x - 2) inches with the width of the red region is 4 in what is the area of the red part of the placemat