How many solutions does this equation have?

5c + 18 = 18 + 16c − 11c

Statement: if two distinct planes intersect, then their intersection is a line. which geometry term does the statement represent? defined term postulate theorem undefined term

Which statement describes surface features called maria on the moon

Which answer goes into the box? (90° clockwise rotation, 90° counter clockwise rotation, translation, or glide reflection)