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Maths Puzzle
Numerical Ability
5_6_7=121 Please help I can't solve this equation.
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solve 2d^2 + 8d +3 = 3
x=-8+ square root 8^2-3-
x=-8 plus/minus square root 40/4
A fisherman takes his boat out to sea and then back to the harbor. The entire trip lasts 8 hours. If he travels out at 18 mph and follows the same route back at 14 mph, how many miles does he travel altogether?