Ab contains the points a(7, -11) and b(8,17). find the slope of a line perpendicular to ab
a. undefined
b.-1/28
c.1/28
d.28

On a piece of paper graph f(x)=5•(0.4)^x

Hiroaki wants to find 3 3/4 - 7/8 explain why he must rename 3 3/4 to do the subtraction.

Iwill give brainliest. suppose tommy walks from his home at (0, 0) to the mall at (0, 5), and then walks to a movie theater at (6, 5). after leaving the theater tommy walks to the store at (6, 0) before returning home. if each grid square represents one block, how many blocks does he walk?