Answer:
$0.85
Step-by-step explanation:
Given that,
Price of 10 tacos for $8.50
We need to find the charge for 1 taco.
We can find it using the unitary method.
10 tacos = $8.50
1 taco = [tex]\dfrac{8.5}{10}[/tex] = $0.85
Hence, restaurant A charge $0.85 for 1 taco.