exam Maths Puzzle Numerical Ability

what is the definition for a pair of straight lines ? can we give it in terms of eccentricity?

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exam Other Question

Can someone please help me with these problems-

7x+3>9x-5

and

5x-5<2x+10 Pete won $10 000 in a lottery. He invested his winnings, part at 10% per annum and part at 11% per annum. If the total interest earned was %1060, how much was invested at each rate?