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15 January, 07:28

The total of your dinner bill plus tip is $19.00. You left a $3.00.

(a) The $3.00 tip is what percent of the dinner bill?

(b) The percent in part (a) is you customary tip percentage. Write an expression for the total of a dinner bill plus tip, for any d dinner bill.

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  1. 15 January, 07:47
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    A. Roughly 16%

    B. D=x+T

    Step-by-step explanation:

    A. You want to leave a 16% tip on a meal that cost $19.

    First, convert the 16% to an actual number that can be used in a calculation. For percents, this is always done by simply dividing the percent (in this case 16%) by 100%. So, the conversational term "16%" becomes 16% / 100% = 0.16 in terms of a real mathematical number.

    Second, you need to find out what 16% of your $19 meal cost is. This is always done by multiplying 0.16 by $19.00, or

    0.16 x $19.00=$3.04.

    So, the amount of tip you are going to leave is $3.04.

    B. D=dinner bill. X = meal price, T=tip.

    X+T=D or, D=X+T.
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