exam Maths Puzzle Numerical Ability

Evaluate

-c2nd power - 5(c 0 power + d)2nd power if c = -3 and d = 4

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exam Other Question

I need to find the second moment of area of a rectangular beam, can anyone please help?!

The equation: I = bd^3/12 (second moment of area of a rectangular beam) becomes => b(2b
Find the slope of any line perpendicular to the line through points (0, 5) and
(-3,-4).