Ask a New Question

your test scores in one class are 80 and 88. what possible scores can you earn on your next test to have a test average between 84 and 89, inclusive?

1 answer

well, try 84

(80 + 88 + x)/3 = 84
168/3 + x/3 = 84
168 + x = 252
x = 84 of course since that was original average

now 89
80 + 88 + x = 3*89 = 267
168 + x = 267
x = 99
so

84 </= x </= 99

Similar Questions

Ralph needs to earn a B in his Geology class. His current test scores are82,83, 90, and 77. His final exam is worth 4 test
1. 3 answers
Brianna needs to earn a C in her Geology class. Her current test scores are 65, 67 67, and 93. Her final exam is worth 6 test
1. 1 answer
Gail needs to earn a B in her Geology class. Her current test scores are 89, 78, 77, and 85. Her final exam is worth 3 test
1. 3 answers
Your test scores in one class are 78and 84 . What possible scores can you earn on your next test to have a test average between
1. 1 answer

more similar questions