Question

Lindy works at a pizza restaurant and gets a 10% employee discount. She knows that if she orders d drinks and a medium pizza with t toppings, her total cost can be found using this expression:

0.90(2.25d + 1.40t + 6).

What is the total cost for Lindy and her friends to order 4 drinks and a medium pizza with 3 toppings?

Answer 1

To find the total cost for Lindy and her friends to order 4 drinks and a medium pizza with 3 toppings, we can plug the values \( d = 4 \) (for 4 drinks) and \( t = 3 \) (for 3 toppings) into the expression provided:

\[
0.90(2.25d + 1.40t + 6)
\]

First, we calculate the terms inside the parentheses:

1. **Calculate \( 2.25d \)**:
\[
2.25 \times 4 = 9.00
\]

2. **Calculate \( 1.40t \)**:
\[
1.40 \times 3 = 4.20
\]

3. **Add the fixed cost for the pizza**:
\[
6.00
\]

Now, put these values into the expression inside the parentheses:

\[
9.00 + 4.20 + 6.00
\]

Calculating this gives:

\[
9.00 + 4.20 = 13.20
\]
\[
13.20 + 6.00 = 19.20
\]

Now we take this total and multiply by 0.90 to apply the employee discount:

\[
0.90 \times 19.20
\]

Calculating that gives:

\[
0.90 \times 19.20 = 17.28
\]

Thus, the total cost for Lindy and her friends to order 4 drinks and a medium pizza with 3 toppings is:

\[
\boxed{17.28}
\]