A spider is climbing on a wall. It starts at point A (rest of the question is in description)

Question

A spider is climbing on a wall. It starts at point A, moves straight up 15 inches, to the right 7 inches and then straight down 6 inches to stop at point B. If M represents the midpoint of AB, then find AM.

Answer 1

up 15 right 7 down 6 is same as up 9 right 7 from A to B

distance from A to B = the hypotenuse of a right triangle with legs 9 and 7

= sqr(81+49)= sqr130

am the midpoint is of length (sqr130)/2

= about 5.7