The sum of the first ten terms of an a. p is 120 and the sum of the first 20 terms is 840,
the sum of the first thirty terms.

What is the slope of the line shown below?

Which property was used to simplify the expression? 3c+9 +4c=3c+4c+9

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