Answer:
21+3x
Step-by-step explanation:
Answer:
32
Step-by-step explanation:
3+30-1
33-1
32
Answer: 90 Earth years.
Step-by-step explanation:
Analizing the information provided in the exercise, you need to find the Least Common Multiple (LCM) of the given numbers.
You can follow these steps:
1. You must descompose 6, 9, 15 and 18 into their prime factors:

2. Finally, you need to choose the commons and non commons with their greatest exponents and multiply them. Then you get:

Therefore, it will take 90 Earth years for them to all line up.
Answer:
its 31
Step-by-step explanation:
because there are 2 medians you have to find the average so you add them and divide by 2.