21. Consider the geometric sequence-8, 16, -32, ... Which of the following statements are true?
a. The common ratio is 2.
b. The 5th term of the sequence is -128.
C.
The 7th term is 4 times the 5th term.
d. The 8th term is 1024.
e. The 10th term is greater than the 9th term.

What is the inverse of the function f(x) = 2x + 1?

Someone answer this asap rn for ! a discount store’s prices are 25% lower than department store prices. the function c(x) = 0.75x can be used to determine the cost c, in dollars, of an item, where x is the department store price, in dollars. if the item has not sold in one month, the discount store takes an additional 20% off the discounted price and an additional $5 off the total purchase. the function d(y) = 0.80y - 5 can be used to find d, the cost, in dollars, of an item that has not been sold for a month, where y is the discount store price, in dollars. create a function d(c(x)) that represents the final price of an item when a costumer buys an item that has been in the discount store for a month. d(c(x)) =

The data set represents the ages of players in a chess club. 27, 34, 38, 16, 22, 45, 54, 60. what is the mean absolute deviation of the data set?