exam Maths Puzzle Numerical Ability

Write a linear equation through the point (-1,-5) perpendicular to the line y=-3x + 4

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8-9k=21k-17 sketch a curve of the design of a car, label four points and find the cubic function that fits the points. Use the equation y=ax^3+bx^2+cx+d solve for a,b,c and d using a 4x4 inver