Question

4.36 question help to get a b in? math, alexandria pappas must average 80 on five tests. scores on the first four tests were 8282?, 7878?, 8282?, and 7777. what is the lowest score that she can get on the last test and still get a? b

Answer 1

(82 + 78 + 82 + 77 + x) / 5 = 80
319 + x = 80 * 5
319 + x = 400
x = 400 - 319
x = 81 <== she can get an 81 on it and still get a B