Yolanda was standing on the middle step of a staircase, painting a wall. She went up four steps to touch up a spot, then she went down five steps to continue painting. When she finished everything within reach, she went down six steps to the first step. Which step was the middle step. How many steps were there in the staircase. Use backwards working pl answer i would rate 5 stars. plz help

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Step-by-step explanation:

(x+4)-5)-6 =1

combine the +4 and -5

x-7 =1

add 7 to both sides

x=8

Yolanda started on step 8

step-by-step explanation: h: (- 3, 6)

m: (1, - 2)

o: (7, 6)

r: (- 9, - 2)

midpoint of hm: (- 1, 2)

midpoint of or: (- 1, 2)

therefore, b is the midpoint of both diagonals bisect each other !

to prove the diagonals are perpendicular, show that the product of the slopes = - 1

6e14 is the answer.