Given :
A group of three friends order a combo meal which includes case slices of pizza and a drink each drink is priced at $2.50 .
Total bill, T = $31.50 .
To Find :
The cost of a slice of pizza.
Solution :
Price of 3 drinks, P = 3×2.50 = $7.5 .
Now,
[tex]\text{Price of each slice }=\dfrac{\text{Total price - Price of drinks}}{\text{Number of slice}}\\\\p = \$(\dfrac{31.50-7.50}{3})\\\\p = \$8[/tex]
Therefore, price of each slice of pizza is $8.
Hence, this is the required solution.