Answer:
its 1 1/2
Step-by-step explanation:
1 1/2 or 1.5
21 books; 5 weeks
it is d inverse
245+45x=170+60x
therefore in 5 days, they will charge the same amount
$348.82
240 +86=326
326× 7%= 22.82
326+22.82= $348.82