If a seed is planted, it has a 80% chance of growing into a healthy plant. if 9 seeds are planted, what is the probability that exactly 4 don't grow?

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

true? is that what you're asking or do you mean something else?