exam Maths Puzzle Numerical Ability

One solution of 2x^2+11x+k=0 is -5. Find the other solution.

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exam Other Question

5. If a man with blood type A, one of whose parents had blood type O, marries a woman with blood type AB, what will be the theoretical percentage of their children with blood type Tutor If you can please help me in finding the equivalent to this expression...thank you very much

100s^3-80s2+20s over 10s^2

Would it be 10/s-80s^2+20s