exam Maths Puzzle Numerical Ability

Please help!
If we establish an identity, (in simplest terms)4 sec^2 A - 7 tan^2 A would equal what?
Thank you, Tami

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exam Other Question

Farmer John stores grain in a large silo located at the edge of his farm. The cylinder-shaped silo has one flat, rectangular face that rests against the side of his barn. The heigh What is the transformational form of the quadratic function described by the mapping rule (x,y)> (x+2,3/4y-3)?
I said 4/3y+3=(x-2)^2 but I was marked wrong:(