Answer:

Step-by-step explanation:




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!