exam Maths Puzzle Numerical Ability

A line has the equation 2x-y=3
Find the equation of a line passing through the point (1,-2) that is parallel to this line.
Find the equation of a line passing through the point (

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The formula for future value A of P dollars for t years at a simple interest rate of r (decimal) per year is A=P(1+rt). The formula for continously compounded interest is A=Pe^rt An express and local train leave Grays Lake at 3 P.M. and head for Chicago 50 miles away. The express travels twice as fast as the local and arrives 1 hour ahead of the local. Find the speed of each train.