exam Maths Puzzle Numerical Ability

I dont understand how to do Unit Rate at all. Could someone help me on giving me step by step instructions how to?

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exam Other Question

Solve the equation.
x/8 = 17
please i`m having a hard time doing this problem can you please help me


2. Rewrite the following expressions using a single logarithm.

a. log(3x)+2log(y)-log(z-