Shaunta is developing a recursive formula to represent an arithmetic sequence in which 5 is added to each term to determine each successive term. Which formula could represent her sequence?

Step-by-step explanation:

We are given the following in the question:

An arithmetic sequence where 5 is added to every term.

Thus, common difference, d = 5

Let the first term be

Then, term of an arithmetic sequence is given by:

Putting values, we get,

is the required recursive relation for arithmetic progression.

  21.3

step-by-step explanation:

multiplying the given equation by c/sin(25°), we get

  c = 9/sin(25°) ≈ 21.2958 ≈ 21.3

we assume "c" is the length of ab, the side opposite angle c in triangle abc.