Find the measure of d.
(image attached in file)

A. 100
B. 40
C. 20
D. 50

Use sigma notation to represent the following series for 9 terms.

Answer asap! show all work! find the number of complex roots, the possible number of real roots and the possible rational roots of the polynomial function. then, solve for all roots. x^3 + 2x^2 + 3x + 6 = 0

For the right triangle shown, the lengths of two sides are given. find the third side. leave your answer in simplified, radical form.