HELP ME PLEASE HERE IS THE IMAGE I NEED THE HELP PLEASE

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ab=9, and ac=12, find hc.

The following frequency table relates the weekly sales of bicycles at a given store over a 42-week period. value01234567frequency367108521(a) in how many weeks were at least 2 bikes sold? (b) in how many weeks were at least 5 bikes sold? (c) in how many weeks were an even number of bikes sold?

2y= 3 2 x−2 y = − 1 3 x + 1 y=− 3 1 x+1