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Maths Puzzle
Numerical Ability
Solve 4x^2=13x+12
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HELP! Stabilization ratio. The stabilization ratio (births / deaths) for south and central America can be model by the formula y = -0.0012x^2 + 0.074x + 2.69 where y is the number
How many grams of gold alloy that costs $4 per gram must be mixed with thirty grams of a gold alloy that costs $7 per gram to make an alloy that costs $5 per gram?