Answer:
can be written as the single logarithm:

Step-by-step explanation:
Start by using in both terms of the expression the property of logarithm of a power that states:

so we recognize that the factor that multiplies each logarithmic expression, can be understood as the power of the argument of the function logarithm:

Then we use the property of logarithm of a product which states that:

So now we recognize the expression:

as the logarithm of the product:

which is finally a single logarithm as requested.
Answer: 6n+1
Process: trial and error (sorry it’s not more i. depth)
Answer:
27
Step-by-step explanation:
y=kx
9=k*5, so k=9/5
when x=15
y=(9/5)*15=27
His commission is simply: $15,000 x 0.04 = $600