Rebekah measured two line segments using metric units. The first line segment is 30 centimeters long The second line segment is 500 millimeters long. What is the total length, in centimeter, of the two line segments
To find the total length in centimeters, we need to convert the second line segment from millimeters to centimeters.
There are 10 millimeters in 1 centimeter.
So, 500 millimeters is equal to 500/10 = <<500/10=50>>50 centimeters.
Therefore, the total length of the two line segments is 30 + 50 = <<30+50=80>>80 centimeters. Answer: \boxed{80}.