Which expression is equivalent to (x^-4y/x^-9y^5)^-2

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

What is the product? a-3/15a × 5/a-3

Describe a pattern in each sequence what are the next two terms of each sequence -5, 5, -5, 5 a. subtract 10 from the previous term; -5,5 b. multiply the previous term by 1; 5, 5 c. add 10 to the previous term; -5, -15 d. multiply the previous term by -1; -5, 5