Answer:
x^2-3x-28
Multiply the coefficents of the first and last terms, and find two factors that add to the coefficent of the middle term.
x^2-7x+4x-28=x(x-7)+4(x-7)
(x+4)(x-7)
2022 students
Step-by-step explanation:
Since 18 out of 270 students speak three or more languages, a prediction would be 30,330 x 18/270 = 2,022 students
It would take 10 minutes
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