Which of the expressions below can be factored using the difference of
squares method?
O A. 9x2-16y2
O B. 9x+16y
O C. 9x-16y
O D. 9x2 + 16y2

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?