Respuesta :
She can buy 7 pizzas. Before I get into the math im pretty sure you misused the < symbol (=) but whatever. Firstly you subtract 400 from 505 (505 - 400) which equals 105. Now all you need to do is divide 105 by each number in an answer choice to get your answer. After completing you will find that D is correct because 7 x 15 = 105.