13. EARNINGS The original price of a model car is d dollars. You use a coupon and buy the kit for (d − 10) dollars. You assemble the model car and sell it for (2d − 20) dollars. Write an expression that represents your earnings. Interpret the expression.

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