The answer is A
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6 trips because 1 trip = 3 km
If you divide 18 / 3 it would be 6 and by that multiply the # of trips.
1/36
a 6 on a die is only on one face, so that would be 1/6 of the whole die
to roll a double would mean take 1/6 x 1/6
13 factored out is 13x - 39 add 39 to both sides it equals 13x=78 and 78 divided by 13 is 6 the anwser is x=6
Answer
Subtract 
from 
then;
Remove the bracket we have;
Like terms are those terms which have same variable to the same power.
Combine like terms;
Therefore, Subtracting from we get
