Max is stacking logs at his campground for firewood. after his first load of logs, he has 9 logs on the stack. after his seventh load of logs, he has 51 logs on the stack. use sequence notation to represent the arithmetic function.
a an = 51 + 6(n − 1)
b an = 9 + 6(n − 1)
c an = 51 + 7(n − 1)
d an = 9 + 7(n− 1)

D an = 9 + 7(n-1)

Step-by-step explanation:

In the question, Max has 9 logs in the first load. But, after the seventh load he has a total of 51 logs. So the n would be your logs in the stack, which is 51. And since there is a total of 51 logs after the seventh load. It would be 9 plus 7 in parenthesis of  51 minus one, which is 50. So 50 times 7 comes down to 350 plus nine which comes down to a total of 359.

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^

f is the midpoint of