Samantha is buying ink pens. she sees a 10-pack for $9 and a 5-pack for $6. what is the difference of the unit price of one pen for each pack? a. $0.90 b. $1.20 c. $0.30 d. $0.28

Option C. $0.3

Step-by-step explanation:

Samantha is buying ink pens.

The price of a 10-pack pens  = $9.00

Unit price of one pen = = $0.9

The price of 5-pack pens = $6.00

Each pen cost = = $1.20

The difference of the unit price of one pen for each pack = 1.20 - 0.9 = $0.3

Option C. $0.3 would be the answer.

x+y=90

x=30-y=x

step-by-step explanation:

if you understand you will get the answer