Which of the following is equivalent to 3x-4y=9

Select the best attribute for the angle pair formed by two parallel lines intersected by a transversal.

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?

Asinusoidal function whose frequency is 1/6pi