Usually when you do expressions involving subtraction you can do Keep, Change ,Change
That means you keep the sign of the first number and change the other two signs.
It is best you rewrite the expression to addition because a lot of people don't do well with subtracting .
Answer:

Step-by-step explanation:
Multiply the fraction by the conjugate and solve (would explain more but you're on a time crunch)
According to the information, occupations and functions are organized as follows: music editor - blends music to components of a film, sound mixer - makes recording during program production, and recording engineer - maintains and operates recording equipment.
<h3>What is an occupation?</h3>
Occupation is a term that comes from the Latin <em>occupatio</em>, which is linked to the verb to occupy (to appropriate something, reside in a home, arouse someone's interest). The concept is used as a synonym for work or labor.
According to the above, the functions and occupations that best match are:
- Music editor - blends music to components of a film
- Sound mixer - makes recording during program production.
- Recording engineer - maintains and operates recording equipment.
Learn more about occupations in: brainly.com/question/20199800
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Answer:
median
Step-by-step explanation:
The centre of every data set is the second quartile/50th percentile/median