Amovie earns $100 million the first week it is released. the movie earns $20 million less each additional week. write an equation for the nth term of the arithmetic sequence.

  an = 100 -20(n -1) . . . . . millions earned in the n-th week of release

Step-by-step explanation:

The general term of an arithmetic sequence is ...

  an = a1 +d(n -1)

for first term a1 and common difference d.

If we write the equation to give the sequence terms in millions, the first term is a1 = 100 and the common difference is d=-20. Putting these values in the general form, we have ...

  an = 100 -20(n -1)

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.