Answer:
20
Step-by-step explanation:
20 is the lowest common multiple
Answer:
3 and -3
Step-by-step explanation:
+3 -3 =0
sum mean adding
X=12
This is because you subtract 6 from both sides to get the x isolated.
So x=18-6
x=12 :)
Using scientific notation, it is found that the measure of one astronomical unit in kilometers is 
A number in <em>scientific notation</em> is given by:

- In which

- To realize the conversion from decimal to scientific notation, b is the number of decimal places the comma moves, being positive if to the left, negative if to the right.
In this problem, 1 AU = 150,000,000 km.
- The comma has to move 8 places to the right, hence

Then, the measure is: 
For more on scientific notation, you can check brainly.com/question/16394306