Posted by **kim** on Sunday, March 11, 2012 at 6:36pm.

The life expectancies for men and women in the United States can be approximated by the following formulas:

Women: E= 0.126t+76.74

Men: E=0.169t+69.11

where E represents the length of life in years and t represents the year of birth,measured as number of years since 1975.

a. Write a single equation that can be used to determine in what year of birth

the life expectancy of men and women would be the same.

b. Solve the equation in part a

c. What is the life expectancy for the year of birth determined in part b?

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