While riding her bike to the ocean and back home 5 times, Mary timed herself at 60min, 60min, 49min, 40min, and 47min. She had set a goal of averaging 51 minutes for her rides. How many minutes will she need to spend on her sixth ride to attain her goal? Answer

Idon't see any graph, however the graph of the function : f(x) = x²-2x+3 is a parabola: 1) open upward (since a> 0)2) it intersects y-axis in 3 (y=3)3) its axis of symmetry is x = +1 ( -b/2a)4) it's minimum is y = -2, so its vertex is (1,-2)5) it doesn't intersect the x-axis since discriminant < 0 

Solution: x2+4x=276x=27,x=9/2answer: no