Alyssa was out at a restaurant for dinner when the bill came. She wanted to leave a 15% tip. If dinner cost dd dollars and cents, which expression represents the cost of dinner plus tip?

Answer 1

To calculate the total cost of dinner including a 15% tip, you can start by determining the amount of the tip itself. The tip is calculated as 15% of the cost of dinner, which can be represented as \(0.15 \times d\), where \(d\) is the cost of dinner in dollars.

To find the total cost of dinner plus the tip, you would add the tip to the original dinner cost:

\[ d + 0.15d \]

This simplifies to:

\[ 1d + 0.15d = 1.15d \]

Therefore, the expression that represents the total cost of dinner plus tip is:

\[ 1.15d \]