HELP:::Eric has been donating books he no longer needs to his local library. After 3 months of donating, he had 157 books left in his room. After 8 months of donating, he had 102 books left in his room. How many books per month did Eric donate on average between months 3 and 8?

Question

austinl · Answer

You just asked this question.

anonymous · Answer

I'm trying to get more help because I'm not understanding.

radar · Answer

How many books does Eric have in his room after month 3?

anonymous · Answer

157

radar · Answer

How many did he have at end of month 8?

anonymous · Answer

102

radar · Answer

How many books did he donate between months 3 and 8 ??

anonymous · Answer

I don't know what to do there

radar · Answer

He had 157 now he only has 102, how many books are gone?

anonymous · Answer

55

radar · Answer

O.K., lets call month 5 May, 6 June, 7 July, and 8 would be August.  How many months do we have?

anonymous · Answer

4

radar · Answer

Four months, 55 books they are asking the approximate average per month.  55/4
13 3/4 or 13.75 Rounding off would be 14.  Is this a multiple guess problem?

anonymous · Answer

yes it is.
 -31 books per month
 -18 books per month
 -11 books per month
 -7 books per month

radar · Answer

I guess it is 5 months rather than 4 (8-3) being 5 so average is 55/5 or eleven

radar · Answer

Jan Feb Mar ^Apr May Jun Jul Aug^ Sep Oct Nov Dec
                      1     2      3    4   5
              3rd                             8th

radar · Answer

I messed up counting the number of months.  Sorry abt that.

anonymous · Answer

its fine!!