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Answer:
1. A. 2:3 = 6:9
because the two ratios are equal.
2. Means: 10 and x
Extremes: 4 and 15
3. solve x
x/8 = 6/12 cross multiplication
12x = 48
12x/12= 48/12
x = 4
4. x+4/10 = 3/5
(x+4)(5)= 30
5x +20 = 30
5x = 30-20
5x = 10
x = 2
5. 1 hour = 60 minutes
5:30= x:60
30x = 300
30x/30= 300/30
x = 10