Question

I’m having trouble with this ACT prep guide problem, can someone help me and explain this

Answer 1

SOLUTION:

Step 1:

In this question, we are given the following:

Step 2:

The correct logarithmic expression should be:

$\text{log}_7x+\log _7y-\log _7z_{}=log_7(\frac{xy}{z})$

The reason is that: