how do I find a triangle congruence postulate that can be used to prove the triangles are congruent if any

It says factor each expression 49x-28?

The function show two sisters' savings account and the rate at which they plan to deposit money

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