Answer:
x= 0,5
Step-by-step explanation:
You have to move all the terms to the left side and set them equal to zero. Then set each factor equal to zero.
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4/15 = 0.267
8/25 = 0.32
0.267/0.32 = 0.834375
<u>Part a)</u>
Given the expression

Apply exponent rule: 
∵ 
Rewrite 81 as 3 · 27
Rewrite 54 as 2 · 27

Factor out the common term: 27m³n
Therefore,

<u>Part B)</u>
Given the expression

Apply exponent rule: 

Rewrite as

Factor out common term 5y²x²z

Therefore,

Range is 6 and the mode is 8