What is 13+21? A). 53 B).-34 C).27 D).34
2 answers:
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Since we already have like denominators, just add the numerators and keep the denominator.
Simplify:
Answer:
y=
Step-by-step explanation:
There are three letters A, B, C in order to make the tags and y is the number of tags that can be made using n spaces. So, there are three choices for the first letter A and three choices for the remaining two letters that are B and C respectively.
By the basic counting principle,
Formulae for the number of tags they can make using n spaces is: 3×3×3×3×..........×3( n times)
=
Therefore, y=