Respuesta :
Answer:
[tex]52.5n+449.85[/tex]
Step-by-step explanation:
The cost is given for 1 sweatshirt. To find the cost of 15 sweatshirts, we need to multiply the expression by 15. Let's do this:
[tex]15(3.5n+29.99)\\=15(3.5n+29.99)\\=15(3.5n)+15(29.99)\\=52.5n+449.85[/tex]
This is the expression that represents the cost of 15 sweatshirts.