An arithmetic series has 4 as its fifth term and 31 as its tenth term. Find the sum of the first twenty numbers in the sequence.

What basic trigonometric identity would you use to verify that csc x sec x cot x = csc^(2)x

What is the greatest number of parts of a circle that can be formed by cutting the circle with 7 straight cuts? (note: the parts do not have to be equal in size)

The graph is supposed to show f(x) = 3 sin (x/4+1) - 1/2. which of the following are correctly represented in the graph? select two of the following that apply.