How do you do these?

Algebra
Tutor: None Selected Time limit: 1 Day

Jun 2nd, 2015

Please let me know if you need any clarification. I'm always happy to answer your questions.

22797

115

Please let me know if you have any questions and best me if you are satisfactory.

Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 2nd, 2015

a. Take the 3rd integer as n

so n-2+n-1+n+n+1+n+2 = 755

so  5n = 755

      n = 151

so (n-2) (n+2) = 149*153 =22797


b. n-2+n-1+n+n+1+n+2 = 575

             n = 575/5 =115 = mean


Jun 2nd, 2015

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