cr4ibunmchinLaraZ cr4ibunmchinLaraZ

06-11-2016
Mathematics

Answered

If the common difference in an arithmetic sequence is 4, and the 20th term is 36, what is the first term?

A40
B76
C40
D2 please select the best answer from the choices provided a b c d

Verified Answer :

kingdonald1 kingdonald1

07-11-2016

4 difference, subtract 20 point - 1st point, =19, 19 places x difference of 4= 76 more or less than 36. More would be 112, less would be -40.
A and C are both 40 while choice B = the difference so I'd say it's supposed to be 1 of the 40's but it's missing the negative sign

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