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February 28, 2015

February 28, 2015

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

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?

- Algebra -
**Damon**, Sunday, March 11, 2012 at 7:11pm0.126t+76.74 = 0.169t+69.11

or

.043 t = 7.63

or

t = 177

year = 1975 + 177 = 2152

if t = 177

E = .126(177) + 76.74

E = 99.1 years old

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