Answer:
x = 10
Explanation:
Note the following rules before we begin:
2 ln(a) = ln (a²)
ln (a) + ln (b) = ln (ab)
Now, for the given:
ln(20) + ln(5) = 2 ln(x)
ln(20*5) = ln(x²)
ln(100) = ln(x²)
This means that:
100 = x²
Therefore:
either x = 10 .........> acceped
or x = -10 .........> rejected as no negatives are allowed within ln functions
Hope this helps :)
Cross and multiply which should get you 4x=45 then divid 4 to each side and the answer should be x=11.25
Answer:
B IS THE ANSWER
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
3³ = 27
(3x²)³ = 27x⁶
(y³)³ = y⁹
(z³)³ = z⁹
ans = (27x⁶y⁹)/z⁹, which is answer C
