Hello!
The expression:

.
First step: Apply the Distributive Property; it is

.


[A negative times a negative equals a positive.]
Next step: Combine like terms.


The simplified expression is

.
Answer:
Concept: Ordinary Mathematics
- Just a general tip: Zoom away further from the camera to capture the question clearer.
- Calculate the Total: 31 students
- A= 4/31= 13%
- (A+B)/31 = 14/31 = 45%
- Can't see clearly what it says
"Twice the difference of three times a number and eight, divided by four" can be displayed as:
<u>2((8 - 3x)/4)</u>
Answer:
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Step-by-step explanation: