exam Maths Puzzle Numerical Ability

Rewrite in a single quanity
ln(5) + 2ln(x)-3ln(z)

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exam Other Question

For the following parabola, find the x-axis intercepts and the
coodinates of the vertex:

-x2 + 11x - 18

I have not a clue on how to start this,,please help me!!!
ThAnKs! The area of a rectangle is 108 cm^2. the ratio of the width to the length is 3:4. Find the length and the width.