The number of african american federal and state legislators has increased approximately linearly from 1136 positions in 2001 to 1256 positions in 2009. let n be the number of african-american legislators at t years since 2000. find an equation of a linear model to describe the data.

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula , what is the temperature in celsius corresponding to r degrees rankine? a. 9/5(c - 273) b. 9/5(c + 273) c. 5/9( c - 273) d. 5/9( c + 273)

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

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.