What is the relationship between a + b and b + a

Scale factor of 2 is used to enlarge a figure as shown below the area of is 18 in.²

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

What three-dimensional solid have 6 rectangular faces, 2 equal bases that are not rectangles and 18 edges