The boston marathon is 26.2 miles. use the times shown in the table to calculate the miles per hour for each division winner. round to the nearest thousandth.

You did not include the table.

I will use this table that I found for a problem with the same statement, and for sure this will teach how to proceed, and it might even be the same data that of your table:

Division                            Record Holder          Year             Time (h)

Men's open                      Robert Cheruiyot       2006            2.121
Women's open                 Margaret Okayo        2002            2.345
Men's wheelchair             Ernst VanDyk            2004            1.305
Women's
wheelchair                        Jean Driscoll             1994            1.523

Miles per our

Just divide the distance (26.2 miles) by the time in hours

Robert            26.2 miles / 2.121 hours = 23.372 miles / hour
Margaret        26.2 miles / 2.345 hours = 11.173 miles / hour
Ernst              26.2 miles / 1.305 hours =  20.077 miles / hour
Jean               26.2 miles / 1.523 hours = 11.203 miles / hour

2x^2 + 7x - 4 = 0

-7 +/- the square root of 49 +32 / 4

When you solve that you get x = 0.5 and x = -4