Can someone pls help me with this

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?

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

Solve the equation. 2x - 8(x+1)= 6(2x - 3)