exam Maths Puzzle Numerical Ability

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x^3+4x^2-3x-12/x^2-3

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exam Other Question

SOLVE FOR THE INEQUALITY AND WRITE THE SOLUTION IN INTERVAL NOTATION

PROBLEM: 2x^2+8x-10>0
PLEASE HELP I'M VERY CONFUSED WITH THIS PROBLEM? WE HAVE TWO ANSWERS (?)"U"(?) BU 44. A new automobile engine can run on a mixture of gasoline and a substitue fuel. If gas costs $1.50 per gallon and the substitue fuel costs 40 cents per gallon, what percent of a mixture must be substitue fuel to bring the cost down to $1 per gallon?