Midnite300 Midnite300

30-04-2018
Mathematics

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Which proportion can be used to find the measure of DE?

12/x = 16/15

12/16 = 15/x

12/15 = x/16

12/16 = x/15

Which proportion can be used to find the measure of DE 12x 1615 1216 15x 1215 x16 1216 x15 class=

Respuesta :

03-05-2018

12/16 = 15/x

other: x/16 = 15/12; x/15 = 16/12; x/(x+15)=16/(16+12) ;)

12/16 = 15/x |cross multiply
12x = 15 · 16
12x = 240 |:12
x = 20

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