Pleaseee helppp with my online school

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

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

What is the probability of throwing several dice with sum equal to 6 (six)? show the ways of possibilities for sum 6 (as the numerator) and the ways of throwing n dices for n = 1, 2, 3, 4 or 5 as denominator for all the questions to earn full credits. (a)throw one die, (b) throw two dice, (c) throw three dice (d) throw 4 dice, (e) throw 5 dice