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OpenStudy (anonymous):
which ratios form a proportion? A.4/9 , 12/25 B.3/7 , 18/42 C.5/11 , 20/45 D.5/8 , 15/25
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OpenStudy (amistre64):
a proportion is an equality if A and B are proportional, then for some scalar k, Ak = B
OpenStudy (anonymous):
so its B
OpenStudy (amistre64):
or, just cross multiply
OpenStudy (amistre64):
B is good
OpenStudy (anonymous):
ight thanks
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OpenStudy (amistre64):
youre welcome
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