exam Maths Puzzle Numerical Ability

35. solve each systems of equations algebraically

x+8y=0
-x+y=-9

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exam Other Question

The Speed of a B&M freight train is 14 mph slower than the speed of an Amtrak passenger train. The freight train travels 330 mi in the same time it takes the passenger train to travel 400 mi. Find the speed of each train. How do you write an equation for this conic equation: parabala with a vertex at (1,-2) and a focus at (1,1) ?