exam Maths Puzzle Numerical Ability

Why Algebra is defined Linear?

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exam Other Question

Solve the system by graphing.
3x-2y=4
-6x+4y=7 A coffee merchant has coffee beens that sell for $9 per pound and $12 per pound. The two types are to be mixed to create 100 lb. of a mixture that will sell for $11.25 per pound. How much of each type of bean should be used in the mixture?