21. For a field trip, a high school wants to buy T-shirts and sweatshirts. The expression px + 29y represents the cost of buying x T-shirts and y sweatshirts
from a store.
If each sweatshirt costs $17 more than a T-shirt, what is the value of p ?
A 5
B 12
c17
D 22
ing on a field trip to a museum. The school hires vans to