Answer:
Total cost = $13.96
Step-by-step explanation:
The total to be paid for the item is the addition of its price plus the taxes. That is:

Which can be rounded to $13.96
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Sum of the interior angles of any triangle is 180° .
Thus ;


Subtract sides 138°


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I believe you set them equal to each other.
2x+4=5x-9
x=4.3
2(4.3)+4=12.6
I think the answer is 12.6
Answer:
28
Step-by-step explanation:
9+15+[14-10]
9+15+4
24+4
28