exam Maths Puzzle Numerical Ability

use matrix methods to solve

x+4y=8
2x+y=9

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exam Other Question

Two airplanes leave an airport at the same time.The heading of the first is 120 degrees and the heading of the second is 320 degrees.If the planes travel at the rates of 700 mph an Find the volume of a cone with a radius of 10ft. and a height of 18 ft.