How to turn grams into kg

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents

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

The difference between two numbers is one. three times the larger number minus two times the smaller number is 9. what are the two numbers