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Step-by-step explanation:
Using the arrangements formula, the number of distinct seating arrangements is:
1287.
<h3>What is the arrangements formula?</h3>
The number of possible arrangements of n elements is given by the factorial of the number n, that is:

When elements are divided and classified with repetition, the number of arrangements is given as follows:

In the context of this problem, the parameters are given as follows:
- n = 13, as there are 13 students in the class.
, as 8 of the students are wearing all blue.
, as 5 of the students are wearing all red.
Hence the number of distinct seating arrangements is calculated as follows:

More can be learned about the arrangements formula at brainly.com/question/20255195
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Answer:
NonLinear line
Step-by-step explanation:
Linearity is the property of a mathematical relationship that can be graphically represented as a straight line. Linearity is closely related to proportionality. Examples in physics include the linear relationship of voltage and current in an electrical conductor, and the relationship of mass and weight.
Answer:
See below
Step-by-step explanation:
The three angles inside of the triangle sum to 180
11x + 4 + 3x + 78 = 180
14x +82 =180
x = 7
then B = 11x + 4 = 11(7) + 4 = 81 degrees
C = 3x = 21 degrees