At Peyton's store, she sells blue shoes for $39.00 a pair and red shoes for $34.30 a pair. Peyton has already sold four pairs of blue shoes to customers. If Peyton only sells red shoes for the rest of the day, how many pairs of red shoes need to be sold to meet the sales goal of $1,200? A. 40 B. 30 C. 39 D. 31

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

what are the options? ?

step-by-step explanation: