Can someone find the median? i got 177 divided by 2 but not sure

The mean finish time was 185.52 with a standard deviation of 0.327 minute. the winning car driven by chris finished in 185.13. the previous year race had a mean finish time of 110.3 with a standard deviation of 0.106. the winning car that year driven by karen finished in 110.13 minutes. find their respective z-scores. chris - z-score karen “- z-score

Which geometric principle is used to justify the construction below?

y=2x−1 5x−4y=1 is (1,1)(1,1) a solution of the system?