Lara draws some triangle models with the measurements she wants to use them to construct them which of these triangles constructions would not be possible 

Which system of linear inequalities is represented by the graph?

Can someone tell me if this is perpendicular? !

Starting at home, emily traveled uphill to the hardware store for 606060 minutes at just 666 mph. she then traveled back home along the same path downhill at a speed of 121212 mph. what is her average speed for the entire trip from home to the hardware store and back?