Car A travels 170 miles in 4 hours. car B travels 306 miles in 4 hours. car C travels 550 miles in 11 hours. Which car has the fastest average speed?

The graph of f(x) is obtained by reflecting the graph of f(x)=-3|x| over the x-axis. which equation describes f(x)? a) f(x)=3|x| b) f(x)=|x+3| c) f(x)=-3|x| d) f(x) = - |x+3|