What is the scale of a map if: 50km in real distance is 2dm on a map?

PLEASE I NEED THE ANSWER ASAP ITS DUE TOMMOROW!
(the answer isn't 1dm:25km it has to be both in dm)

ILL GIVE BRAINLIEST!!!

Gregory draws a scale drawing of his room. the scale that he uses is 1 cm : 4 ft. on his drawing, the room is 3 centimeters long. which equation can be used to find the actual length of gregory's room?

Choose the equation that represents the graph below: (1 point) graph of a line passing through points negative 3 comma 0 and 0 comma 3 y = x − 3 y = −x + 3 y = −x − 3 y = x + 3 will award !

Which of the following will form the composite function?