How are the positions of 20 c and -20 c on the number line ? How are their positions different?

Bring the fraction a/a-4 to a denominator of 16-a^2

Anew movie is released each year for 14 years to go along with a popular book series. each movie is 2 minutes longer than the last to go along with a plot twist. the first movie is 70 minutes long. use an arithmetic series formula to determine the total length of all 14 movies

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