What does the - 8 do in the function k(x)?

k(x) = x^2 - 8

Enter the number of complex zeros for the polynomial function f(x) = x 4+ 5x² +6

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.

Which value of m will create a system of parallel lines with no solution? y= mx - 6 8x - 4y = 12