Two street lights change every 30 seconds and 50 seconds respectively. They last change together at 10:40 am. When will they change together again? so umm I need help on this question haha

The time when they change again = 432seconds

If they flash at 30 and 50 seconds, then a diagram showing their timing helps

30, 60, 90, 120,150

50,100,150

Step-by-step explanation:

So after 150 seconds, both lighthouses flash at the same time

150 sec = 2.5 minutes

10:42 is the answer

1. sometimes

2. never true

3. sometimes

step-by-step explanation:

these are pretty self explanatory if you know what supp right and com angles are