exam Maths Puzzle Numerical Ability

Please evaluate the complex expression writing the final solution in standard form (1 +bi); (2-i)*(3+2i)
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exam Other Question

A slow train leaves the station, 2 hrs later a fast train, with double the speed of the slow train, leaves the station and catches up with the slow train after traveling 180 mi. Find the speed of both trains. Graph the following equations, using the intercept method.

2x + 3y = 6