Which of the following is an example of the associative property?

1. a + (b +c) = (a + b) + c
2. (x - 5)( x + 5) = x² - 25
3. 4z - 8 = - 8 + 4z
4. 7x + 12y = 12y + 7x

Acredit card advertises an annual interest rate of 23%. what is the equivalent monthly interest rate?

2. using calculations based on a perpetual inventory system, determine the inventory balance altira would report in its august 31, 2021, balance sheet and the cost of goods sold it would report in its august 2021 income statement using the average cost method. (round "average cost per unit" to 2 decimal places.)

Write as a product: ac^2–ad+c^3–cd–bc^2+bd