He bought four violas for 40$ each. Later he bought one whistle for 100$. After that, he returned one viola. Write the total cha
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The answer is A, 
. This is because when plugging in -2 for x, the expression will look like this: 
. To make the exponent positive, you have to flip it into a fraction. Then it will be 
. Lastly, you simplify the denominator into 81.