exam Maths Puzzle Numerical Ability

Three different lines, x, y, and z, lie in a plane. Line x is perpendicular to line y. Line y is parallel to line z.Make a sketch and decide how line x is related to line z.

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exam Other Question

Can anybody here please show me how solve and graph the solution on the number line?

2(2 - 3x) <= 4(x + 1)

Thanks. Explain the following in your own words: (a + b)2 � a2 + b2. Give a numerical example to illustrate this.