algebra

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problem 1 Life expectancy of man 73.7, in 2002 it was 77.5 years since 1995
E(t) ? t+?
E (11)= ?


problem 2 14m+5n-5m-7n

  • algebra -

    1. You have stated the problem incorrectly. If E was 77.5 "since 1995", it could not be 73.7 in 2002. Also, the trend is incorrect. Thirdly, you have not defined what year is t = 0.

    2.Combine m terms and n terms separately. You should get 9m -2n

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