devon71
devon71 devon71
  • 09-05-2016
  • Mathematics
contestada

find the missing number ___:7 = 12:21

A.14
B.12
C.4
D.3

Respuesta :

Cata9 Cata9
  • 13-04-2017
The question is asking us to "find the missing number ___:7 = 12:21 First, let's see how similar are 7 and 21 - 21 is 7 multiplied by 3. So the gap will be filled in by something that multiplied by 3 will give us 12. So we have : x*3=12, and also: x=12/4=4, so the answer is C.4
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