Answer:
![x=160](https://tex.z-dn.net/?f=x%3D160)
Step-by-step explanation:
![\frac{x}{6+4} =16](https://tex.z-dn.net/?f=%5Cfrac%7Bx%7D%7B6%2B4%7D%20%3D16)
![\frac{x}{10} =16](https://tex.z-dn.net/?f=%5Cfrac%7Bx%7D%7B10%7D%20%3D16)
![x=16 \times 10](https://tex.z-dn.net/?f=x%3D16%20%5Ctimes%2010)
![x=160](https://tex.z-dn.net/?f=x%3D160)
First of all, how do you buy exactly 15.5 pizzas?
what is a 0.5 pizza?
anyway
cost=cost per pizza times number of pizzas
cost per pizza=10.50
number of pizzas=15.5
cost=10.50 times 15.5
cost=162.75
total cost is $162.75
The 1st one is the right answer
250/100 = 2.5
2.5*7 = 1.75
$1.75
Hope this helped!