Jasten
23.09.2019 •
Mathematics
How to do this and the answer step by step
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Ответ:
Ответ:
(L + 10)/(L + 16) = 0.8
Step-by-step explanation:
She needs to answer L more questions to get a grade of 80%.
When she answers L more questions correctly, she will have answered L + 10 questions correctly.
The total number of questions will be L + 16.
L + 10 must be 80% of L + 16
(L + 10)/(L + 16) = 0.8