To find the total amount that Brandon paid, we can break down the problem into steps.
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Calculate the tax on the bill: The tax is 6% of the subtotal (xx). Thus, the tax amount is: \[ 0.06 \cdot xx \]
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Calculate the total bill including tax: The total bill (T) after adding the tax to the subtotal is: \[ T = xx + 0.06 \cdot xx = xx(1 + 0.06) = xx \cdot 1.06 \]
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Calculate the tip: The tip is 15% of the total bill (T): \[ \text{Tip} = 0.15 \cdot T = 0.15 \cdot (xx \cdot 1.06) = 0.159 \cdot xx \]
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Calculate the total amount paid: The total amount paid (Total) is the total bill (T) plus the tip: \[ \text{Total} = T + \text{Tip} = xx \cdot 1.06 + 0.159 \cdot xx \]
Now, we can factor out xx from both terms: \[ \text{Total} = xx(1.06 + 0.15) = xx(1.21) \]
Therefore, the total amount that Brandon paid is: \[ \text{Total} = 1.21 \cdot xx \]
So, the final expression representing the total amount that Brandon paid in terms of xx is: \[ \text{Total} = 1.21xx \]