Help fast please !! Represent the following sentence as an algebraic expression, where "a number" is the letter x. 4 is added to twice a number.

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.

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