exam Maths Puzzle Numerical Ability

This is the problem: Use unit multipliers to convert 16,000 inches to miles. I am stumped!

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exam Other Question

3x-4y_<12
2x-y_<10
Hello I was wondering if you could help me on this problem?

Simplify. (i is for imaginary number.)

(3-6i)/(-4i)

Thank you,
Kumi