Z-7=5
what is the answer to my problem

Which undefined geometric term is described as a location on a coordinate plane that is designed by an ordered pair (x,y) ?

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

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?