exam Maths Puzzle Numerical Ability

what is the equation for the coordinates (1,2) and (2,4)

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exam Other Question

2w-x+5y+z=-3
3w+2x+2y-6z=-32
w+3x+3y-z=-47
5w-2x-3y+3z=49 Express your answer in scientific notation.
3.5 x 10^3
_______________
1.5 x 10^12

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