x^2 - 9x - 90 = 0, where x is her actual marks
Answers
Answered by
3
Answer: 15
Step-by-step explanation:
As marks shouldn't be negative, x=15
Similar questions
Biology,
7 months ago
Social Sciences,
7 months ago
Science,
7 months ago
Chemistry,
1 year ago
Physics,
1 year ago