exam Maths Puzzle Numerical Ability

Write the equation of the line x-intercept (12,0) and y-intercept (0,4).

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exam Other Question

I each dimension of room is increased one meter, the area is increased by 51 meters; and if the length is increased one meter and the width diminished by one meter, the area is decreased three square meters. Find the dimensions of the room? Find the exact value of:
4csc(3pi/4)-cot(-pi/4)