Step B would be correct because you trying to find the total number of hours she reads in 8 days and not the difference. <span />
Answer:
if donuts are 2 for each and cookies for 1 each it could be
X x 2 and X x 1
one equation could be 4 donuts for 2$ and 7 cookies for 1$
The common factors for 20 is 1,5
25 is 1,5
40 is 1,5
GCF:5
