exam Maths Puzzle Numerical Ability

Solve by the elimination method
3r-2s=-4
2r+3s=32

what is the solution of the system

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exam Other Question

Finding MSRP. What was the MSRP for a Hummer H1 that sold for $107,272 after an 8% discount? The cost, in millions of dollars, to move x% of pollution in a lake modeled by
C= 6,000/200 - 2x.

Question: What is the cost to remove 75% of the pollutant?