Aline perpendicular to -9x + 2y = -8

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

Graph the following piecewise function.

Awalker is already walking 5km per day and decides to increase this amount by 0.1km per day starting on 1st august. what distance will he be walking on 3rd august? b. is this an arithmetic sequence? explain your reasoning. c. what is the formula for the nth term?