exam Maths Puzzle Numerical Ability

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:(

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exam Other Question

Please help!
If we establish an identity, (in simplest terms)4 sec^2 A - 7 tan^2 A would equal what?
Thank you, Tami
please help i have 2 problems im stuck on
the first
7x-5y=-15
and the second
6y+5x=-6

both use y=mx+b
thanks