posted by Robin .
Solve the system by graphing
divide 1 equation by 2
divide 2 equation by -2
this makes both equation dependent
slope intercept of two equation
this makes this consistent.
Just helping if I can.
In 1992 the life expectancy of males in certain a countrywas 66.5 years in 1996 it was 69.4 years let E represent the life expectancy in year t and let t represent the number of years E(t)= ?T+ ? round to the nearest tenth