How many solutions does the following equation have?
2x + 2-3x = 3x - 4

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

#1-20 state whether the angles are alternate interior, alternate exterior, vertical, or corresponding angles.

Solve the triangle. a = 21°, c = 105°, c = 5