EXTRA POINTS IF CORRECT write the perimeter of the triangle in simplest form 2x-6 x+8 3x+1

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.

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

Tom drove 206 miles in 3.9 hours. estimate his average speed.