Lights flash every four seconds. the store owner turns on the lights. After how many seconds Will all three lights flash at the same time for the first ...
Answer:
10/9ths or 1& 1/9
Step-by-step explanation:
1/3 + 7/9 =
× 9/9. × 3/3
9/27 + 21/27 = 30/27
OR 1 & 1/9
