Noahs cafe sells special blends of coffee mixtures. noah wants to create a 20-pund mixture with coffee that sells for $9.20 per pound and coffee that sells for $5.50 per pound. how many pounds of each picture should he blend to create a coffee that sells for $6.98 per pound?

thank you theres another one that i need help with, i just can understand word problems

A childcare company charges $435 per month for children who attend full time and $275 per month for children who attend part time. this month, they have 35 children registered for a total fee of $12,985. how many children are full time and how many children are part-time?