Our first expression is equal to zero:

So we simply find the expression that is equal to zero.
The final answer is a.
The mechanical advantage of the block and tackle is that it is easier to lift a lock using multiple parts of the rope that go around the system of pulleys. If there are no friction, the mechanical advantage is exactly equal to the number of parts of the rope that are attached to the load.
Answer:
The fraction 13/7 is a rational number. Both 13 and 7 are integers (whole numbers), so by definition, 13/7 is a rational number
a. log₈8 = 1
b. log₇6/5
c. log₉3¹
<h3>The solution to the problem are</h3>
1. log₈ 2 * 4 would produce an integer
= log₈8 = 1
The output is an integer
2. log₇6/5 would give us an irrational number
= log₇1.2
This would give us an irrational number
3. log₉3¹ would give us a rational number
= log₉9^
= 1/2 log⁹9
= 1/2
Read more on rational numbers here: brainly.com/question/12088221
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Answer:
f= d/ 1+x
Step-by-step explanation: