lakenyahar
05.05.2020 •
Mathematics
Which pair of ratios form a proportion? 97 points
5 : 10 and 10 : 15
8 : 12 and 18 : 27
9 : 15 and 24 : 30
6 : 20 and 7 : 30
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Ответ:
8 : 12 and 18 : 27
Step-by-step explanation:
5:10 and 10:15 simplify to: 1:2 and 2:3
8:12 and 18:27 simplify to: 2:3 and 2:3
9:15 and 24:30 simplify to: 3:5 and 4:5
6:20 and 7:30 simplify to: 3:10 and 7:30
The ONLY pair of equal proportions is the second one (8 : 12 and 18 : 27), making it the right answer
Ответ:
Second one:
8 : 12 and 18 : 27
Step-by-step explanation:
5 : 10 and 10 : 15
5/10 , 10/15
1/2 , 2/3
Not constant, so not proportional
8 : 12 and 18 : 27
8/12 , 18/27
2/3 , 2/3
Constant, so proportional
9 : 15 and 24 : 30
9/15 , 24/30
3/5 , 4/5
Not constant, so not proportional
6 : 20 and 7 : 30
6/20 , 7/30
3/10 , 7/30
Not constant, so not proportional
Ответ:
x=6
Step-by-step explanation:
6x+7=43
6x=43-7
6x=36
x=36/6
x=6