What is the sum of the series? 5∑i=1 4i

Classify the following triangle check all that apply

Asequence is defined recursively using the formula f(n + 1) =f(n) - 5. which sequence could be

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