nockturnal1993
18.09.2019 •
Mathematics
Which of the following pair of numbers could be the slopes for a set of perpendicular lines?
1/2 and 2
3/4 and -4/3
-2/5 and -5/2
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Ответ:
D
Step-by-step explanation:
9*9m=81m
9*3t=27t
81m+27t=9(9m+3t)