Will give brainliest worth 25 point what is the missing value in this equivalent ratio? 20/42=30/? clara pays $76 for 8 guitar lessons. how much would 10 guitar lessons cost? the ratio of girls to boys in a room is 3/4 . what are other ways to represent this ratio? select each correct answer. 3: 4 4 to 3 3 to 4 4: 3 how long does it take a car to travel 200 miles at a constant speed of 25 miles per hour? 4 h 8 h 10 h 12 h