Had Alita scored 10 more marks in her mathematics test out of 30 marks, 9 times these marks
would have been the square of her actual marks. How many marks did she get in the test?
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Step-by-step explanation:
15
9(10+x) = x^2
90+9x=x^2
X^2-9x-90=0
X=15, - 6
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