exam Maths Puzzle Numerical Ability

I really could use some help with this problem.

(SUM 14)(-0.4i+4)
i=1

I would appreciate any help that I can get.

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exam Other Question

Decide whether the pair of lines is parallel,perpendicular, or neither

Please help me solve the equation: 4x+2y=5
2x-4y=1 Simplify each radical expression.
(sqrt2+ 3)^2