Find the missing value so that the line passing through the 2 points has the given slope, (-7.-3) and (-1, y); slope: 1

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

What is the value of x in the this question ?

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.