Question

tips
customers at restaurants usually leave a tip for the
server. sometimes restaurants add a tip
automatically.
write expressions that the cash register can use to
determine an 18% tip and the total after tip.
original
salad: $8.00
7% tax: + $0.56
total before tip: $8.56
18% tip: + $1.54
total after tip: $10.10
original
sandwich: $13.00
7% tax: + $0.91
total before tip: $13.91
18% tip: + $2.50
total after tip: $16.41

total before tip	18% tip	total after tip
$13.91	$2.50	$16.41
t

try it

Explanation:

Step1: Define the variable

Let \( t \) represent the total before tip.

Step2: Calculate 18% tip

To find 18% of \( t \), we convert the percentage to a decimal (18% = 0.18) and multiply by \( t \). So the expression for the 18% tip is \( 0.18t \).

Step3: Calculate total after tip

The total after tip is the total before tip plus the tip amount. So we add \( t \) and \( 0.18t \), which simplifies to \( t + 0.18t = 1.18t \).

Answer:

Expression for 18% tip: \( \boldsymbol{0.18t} \)
Expression for total after tip: \( \boldsymbol{1.18t} \)