Answer:
$5.79
Step-by-step explanation:
We are told that Trey and his friends wanted to leave approximately a 15% tip for the waiter.
The bill for the pizza and drinks is $38.57.
Hence, 15% of $38.57 is:
[tex]\frac{15}{100} * 38.57 =[/tex] $5.79
They will leave a tip of $5.79 for the waiter.