(6a-3b^2-a) + (b-4+7a^2)
find the sum or difference

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

Joanie watched 1 out of three of a movie in the morning

If the value of cos330°is√3/2 then find cos 165°.