How many planes exist that pass through points a, b, and c?

Which system of linear inequalites is represented by the graph?

Which shows the correct lengths of side c in both scales? scale 1: 45 m; scale 2: 60 m scale 1: 60 m; scale 2: 45 m scale 1: 36 m; scale 2: 27 m scale 1: 27 m; scale 2: 36 m mark this and return save and exit

What is the area of the triangle 10 13 12