Answer:The cost to ship one ounce is $0.48 per ounce
Step-by-step explanation:
The total weight of the package that Julia shipped is 9.5 ounces. Julia pays $4.56 to ship a package that weighs 9.5 ounces. The cost to ship one ounce would be
4.56/9.5 = $0.48 per ounce
See attachments for the answers.
Answer:
a = ±10/9
Step-by-step explanation:

A+b=6.1 ---(1)
a-b=1.6 ---(2)
(1)+(2); 2a=7.7
then a=3.85
so b=a-1.6 = 3.85-1.6 = 2.25
so that the two numbers are 2.25 and 3.85