- Please help solve the two problems Thanks...?

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What is the structure of: C10H10O2: NMR: δ 2.82 (6H, s), δ 8.13 (4H, s) IR: 1681 cm–1, no O–H stretch? Any genius with a solution ??????? ...!? If f(x)=x^(4)+4x^(3)+6x^(2)+5x+1 find value of a such that f(a)=f^(-1)(a)? Kx+ 8y=k-4 3x + (k - 2) y= 1
solve for x and y in terms of k.? Why did my arms neck and face go red when I was drinking alcohol?