book Maths Puzzle Numerical Ability

My question is to solve the system of equations x + y =0 and xy = 40 to find Cardano's (complex) solution and to make sure that the sums of the two complex numbers is 10 and that t

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book Other Question

determine the slope and the y- intercept for : y-2/3x=-2 The amount of a radioactive tracer remaining after t days is given
by A = A0 e^�0.058t, where A0 is the starting amount at the beginning of
the time period. How many days will it