Slove for lengths of the right triangle sides, which equation is correct?

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

Which of the following is not a subset of {1,2,3}?

Mis the midpoint of rq if rm equals 2x + 5 and mq equals 4x - 9 what is the length of rq