exam Maths Puzzle Numerical Ability

Given A(-4,6), B(-1,2),C(x,14) and D(5,10). If AB is parallel to CD, find the value of x.

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exam Other Question

Assume that x,y and z are positive numbers. Use the properties of logarithms to write the expression log(5sqrt x^4y^6 over z^5) in terms of the logarithms of x, y and z. I think Please help me solve this problem: 2(y-1)squared=ysquared