exam Maths Puzzle Numerical Ability

3+sqrt-25 divided by 4-sqrt-64

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exam Other Question

312 is 15% less of what number? hey i need help on complentary angles. This is the question.

Angles Q and R are complentary. Find the measure of each if mLA=(3x-7)degrees and mLB=(11x-1)degrees.

please and thank you!