exam Maths Puzzle Numerical Ability

the orderd pair (-2,1) is a solution to the following system:
2x+5y=1
3x-2y=4

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exam Other Question

The problem states, Of all possible quotients of the numbers 10, -1/2, -5, and 1/5, which two produce the largest quotient? Which two produce the smallest quotient?

I am not exactly sure how to figure this out. 1. What are some everyday uses of coordinates systems other than Maps, Chess, CNC machines, Robots, GPS system, and Space travel? Why are they important?