The mean of a set of five test scores is m. what is the sum of the five test scores?

Idont get this question can someone me solve it? ** the distance light travels in one second (1 light second) is about 1.86 ×10^5 mi. saturn is about 475 light-seconds from the sun. about how many miles from the sun is saturn..my guess is 8.83* 10^7 you so much

If you answer right ill give brainliest, : )

Measure a and b and find their sum. how are the angles related?