Answer: The expression is undefined for x=4 and x=5.
The expression is undefined for any x that makes the denominator 0. This leads to solving a quadratic equation:

Answer:
These dimensions represent area of a shape, or area of each side of a 4 sided 3D shape.
Answer:
D/z
Step-by-step explanation:
Since D and z are variables, we can express the division as a fraction:
D/z
Answer: 50%
Step-by-step explanation:
There's a 50% chance of landing on tails. So, it would land on tails about 100 times.