Posted by Liz on Monday, October 31, 2011 at 1:12pm.
A student is taking a literature course in which four tests are given. To get a B, he must average at least 80 on the four tests. The student got scores of 82, 76, and 78 on the first three tests. Determine (in terms of inequality) what scores on the last test will allow him to get at least a B.
I am not quite sure how to handle this problem. Any help would be great.

Algebra  Steve, Monday, October 31, 2011 at 2:11pm
If he gets a score of n on the 4th test, then his total points are
82 + 76 + 78 + n
The average will then be
(82 + 76 + 78 + n)/4 >= 80
(236+n)/4 >= 80
236+n >= 320
n >= 84

Algebra  Liz, Monday, October 31, 2011 at 2:13pm
Thank you so much. This kind of what I thought but was not to sure.

Algebra  joe, Tuesday, April 15, 2014 at 1:53pm
84

Algebra  Crystal, Wednesday, November 5, 2014 at 10:55pm
Peter scored 17;88 and 97 on three test. How much he scored on the next test to have at least an 85 average
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