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sammigrace5820
15.05.2021 •
Mathematics
Trinity’s scores on the first 4 tests were 97, 92, 76, and 89. What is the minimum score Trinity needs to make on the fifth test so that her mean test score is at least 85?
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Ответ:
Ответ:
Explanation:
Let’s use x for what the fifth test will be called.
1: The mean test score = (97 + 92 + 76 + 89 + x) • 5 = 85
^ the 85 is there because that’s the number she at least wants for her mean test score.
2: (354 + x) • 5 = 85
3: Multiply 5 • x to get it out of the parenthesis then do the same with the other side (85).
4: 354 + x = 425
5: 425 - 354 = 71
6: x = 71
Ответ:
the answer is 40 i had it on USATestPrep
Step-by-step explanation:
ion need one lml