Factor the following expression completely 16a + 20

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?

What value is a discontinuity of x squared plus 8 x plus 4, all over x squared minus x minus 6?

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