Help please and show all work also will give brainliest

Pat listed all the numbers that have 15 as a multiple write the numbers in pats list

Asystem of equations has 1 solution. if 4x-y=5 is one of the equations , which could be the other equation ?

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.