exam Maths Puzzle Numerical Ability

solve using the quadratic formula
5x^2 + 8x = -3

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exam Other Question

A boat can row 30 km upstream and 44 km downstream in 10 hours. Also it can row 40 km upstream and 55 km downstream in 13 hours. What is the speed of the boat in still water? (a) 5 km/hour (b) 7 km/hour (c) 8 km/hour (d) 10 km/hour A baseball player gets 16 hits in 50 at bats. What percent are hits and what percent are nonhits.