MCQ PracticeIf m : n = 3 : 2, then (4m + 5n) : (4m - 5n) is equal to = ?Subject: MathematicsTopic: Ratio And ProportionA4 : 9B9 : 4C11 : 1D9 : 1Correct Answer: CPractice QuizBack to MCQsRelated MCQsCurrent flows in a circuit whenEighttenths coulomb passes a point in 4 s. The current in amperes isThe unit of electrical charge is the