Answer: x < 8 (max number of pizzas is 7)
Step-by-step explanation:
set up an inequality where x = number of pizzas
total < 380 (this is given)
total = 300 + 10x (she already spent 300, and each pizza costs 10 each)
300 + 10x < 380
now solve for x
300 + 10x < 380
10x < 80
x < 8
if she wants to spend less than $380, she needs to buy less than 8 pizzas, so she can buy 7 pizzas at most