The constraints of a problem are listed below. what are the vertices of the feasible region? (0, 0), (0, 2.5), (1.5, 2), (3, 0) (0, 0), (0, 4), (1.5, 2), (7.5, 0) (0, 2.5), (1.5, 2), (4, 3) (0, 4), (1.5, 2), (7.5, 0)

Find the quotient. 50a2 – 98b2 -5a +7b

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?

Anyone know? will mark brainliest if correct