What are the leading coefficient, constant term and degree, if any, of the algebraic expression 7^x+ 2x + 1?

Can any one me with the answers to these questions asap?

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

What is the measure of angle x? a.101 b.158 c.44 d.79