21 (A.120) Maria wrote the sequence 4, 3, 2, 1, 0, -1 What is the formula for the nth term?
A F(n) = 5n - 6
C F(n) = 5-n
B F(n) = n-5
D F(n) = 5n + 6
Ise the information below to answer 22-23

If the angle bisectors of a pair of opposite angles of a quadrilateral are the opposite sides of a parallelogram formed by the two angle bisectors and two sides of the quadrilateral, is the quadrilateral always a parallelogram? explain your answer.