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Maya was out at a restaurant for dinner when the bill came. She wanted to leave a 
33% tip. If dinner cost 
d dollars and cents, which expression does NOT represent the cost of dinner plus tip?

0.33 d

1d+0.33 d

(1+0.33)d

d+0.33 d

Maya was out at a restaurant for dinner when the bill came. She wanted to leave a 33% 33 \% tip. If dinner cost d d dollars and cents, which expression does NOT represent the cost of dinner plus tip?\newline0.33d 0.33 d \newline1d+0.33d 1 d+0.33 d \newline(1+0.33)d (1+0.33) d \newlined+0.33d d+0.33 d

Full solution

Q. Maya was out at a restaurant for dinner when the bill came. She wanted to leave a 33% 33 \% tip. If dinner cost d d dollars and cents, which expression does NOT represent the cost of dinner plus tip?\newline0.33d 0.33 d \newline1d+0.33d 1 d+0.33 d \newline(1+0.33)d (1+0.33) d \newlined+0.33d d+0.33 d
  1. Understanding Tip Calculation: To determine the correct expression for the cost of dinner plus a 33%33\% tip, we need to understand that a 33%33\% tip is the same as multiplying the cost of dinner by 0.330.33. The total cost including the tip would be the original cost of dinner plus the 33%33\% tip. Therefore, the correct expression should include the original cost of dinner (dd) and add to it the tip (0.330.33 times dd).
  2. Analysis of 0.33d0.33d Expression: Let's analyze the first expression: 0.33d0.33d. This expression represents only the tip amount, not the total cost of dinner plus tip. Therefore, this expression does not represent the total cost.
  3. Analysis of 1d+0.33d1d + 0.33d Expression: Now, let's look at the second expression: 1d+0.33d1d + 0.33d. This expression adds the original cost of dinner (1d1d) to the tip (0.33d0.33d), which correctly represents the total cost of dinner plus tip.
  4. Analysis of (1+0.33)d(1 + 0.33)d Expression: The third expression is (1+0.33)d(1 + 0.33)d. This is equivalent to 1d+0.33d1d + 0.33d when the distributive property is applied, which also correctly represents the total cost of dinner plus tip.
  5. Analysis of d+0.33dd + 0.33d Expression: The fourth expression is d+0.33dd + 0.33d. This is another way of writing 1d+0.33d1d + 0.33d, which correctly represents the total cost of dinner plus tip.
  6. Identifying Incorrect Expression: Since the first expression, 0.33d0.33d, only represents the tip and not the total cost of dinner plus tip, it is the expression that does NOT represent the cost of dinner plus tip.

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