Determine all three angle measurements in Triangle XYZ that has angles that measure (2x – 15)⁰, (x – 5)⁰ and 42⁰.

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?

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?

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?