Which one of these express a true proportion? a)2:3=3:2 ,b) 14:6=28:16 c)3:5=12:20 d)42:7=6:2?

c

Which one of these express a true proportion? a)2:3=3:2 ,b) 14:6=28:16 c)3:5=12:20 d)42:7=6:2?
Why does everybody do these kids' homework for them??? At least explain your answer so they might learn something.





A proportion is basically how something relates to something else, in this case, numbers. You can think of each proportion as a fraction, then just decide which fractions are equal.





So if A really said: 2/3 = 3/2, you would know that is not right. For B, 14/6 does not equal 28/16 either (it would equal 28/12, by simply doubling the 14 and the 6). With C though, 3/5 does equal 12/20 (if you reduce 12/20 by dividing the top and bottom, or numerator and denominator, by 4, you get 3/5).





That is why c is the correct answer.
Reply:answer c)
Reply:c
Reply:Its choice C) because.... 3 x 4=12 and 5 x 4=20. Notice that both three and five get multiplied by four to get you 12 and 20. Trust me... I know i'm right. And please... choose me as your best answer. This is my first answer on Yahoo! Answers.
Reply:A true proportion is equal ratios so reduce. 2/3 does not equal 3/2. 7/3 does not equal 7/4. 3/5 does equal 3/5 because you reduced 12/20 by dividing by 4. 6/1 does not equal 6/2. c is the answer
Reply:questions about ratios are kind of confusing. if the ratio of black to white on a board is 2:3, that means that for every 2 black squares, there are three white squares, so 2/5 of the board is black {2 / (2 + 3) = 2 / 5}.





The only way for two ratios to be the same is if both sides of the ratio are multiplied by the same scalar, so the answer is c.
Reply:c)