Pls help me answer this :’)

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83

In september, louise planted a tree. every month, the tree louise planted grew 2 inches. what would the constant of proportionality of the line be?

For the following equations, find the ratio of a to b. be sure to show all of your work. a. 3a = 6b b. 15a = 5b