The numbers 5 and -5 are opposites. explain why 5 and -5 have the same absolute value

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 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.

Evaluate each expression. determine if the final simplified form of the expression is positive or negative -42 (-4)2 42