What's the common difference of the sequence 0, 5, 10, 15, 20, . . ? a. d = –5 b. d = 3 c. d = –2 d. d = 5

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ac=26 and ch=8, find bh.

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.

Describe the graph of 3x+2> 2 and 3x< 6