Answer:
Step-by-step explanation:
These are geometric means problems. In the top one, a is the geometric mean as the height for both the smaller triangles inside the big one. Therefore,

The next one has the geometric mean of b, being a part of the smaller triangle on the left and the big triangle as a whole:

Answer:
A
Step-by-step explanation:
The theorem we use for this is

Solve for d.



A is the answer
Answer:
It's a property of log() or ln() functions. It's states:

in other word, subtraction of log functions could be combined to a quotient in the log function.
Answer:
8
Step-by-step explanation:
Answer:
72
Step-by-step explanation:
8 times 9 is 72