book Maths Puzzle Numerical Ability

THE_____________ IS THE X- COORDINATE OF THE POINT WHERE A LINE CROSSES THE X- AXIS

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book Other Question

Simplify the expression. Assume that all variables
represent nonzero integers.

[x(-3a - 2)]-4</sup></PRE>
For the functions f(x)=4x-1 and g(x)=3-5x^2 find the compostion g of f(x).