Spinner probability problem, spun twice, what is probability land on 3, then 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?

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

If x = -2, then x 2-7x+10 equals a. 0 b.20 c.28