Help fast! Which one is true?

Arrange these numbers from least to greatest 3/5 5/7 2/9

which of the following sets of data would produce the largest value for an independent-measures t statistic? the two sample means are 10 and 20 with variances of 20 and 25 the two sample means are 10 and 20 with variances of 120 and 125 the two sample means are 10 and 12 with sample variances of 20 and 25 the two sample means are 10 and 12 with variances of 120 and 125

Solve x+3y=6 and 4x-6y=6 by elimination . show work !