Answer:
B.Letter x
Explanation:
When these two lines cross, they make perpendicular lines. They are perpendicular because they cross at right angles to each other
Answer is in the photo. I can't attach it here, but I uploaded it to a file hosting. link below! Good Luck!
tinyurl.com/wpazsebu
Explanation:
A longitudinal wave is composed of compressions and rarefactions. An example of a lomgitudinal wave is sound waves. It's a type of wave thay moves parrelel to axis.