I just got done testing on this! I can definitely help you.
Answer: First we multiply 80 by 3 which gives us 240, then we add the initial 80 that Joe has, which gives us a total of 320 video games. So, they have 320 video games in all.
Unit Rate is showing 1 pairs and what you can do to get the answer is 12/5.79
The area of a square is Side x Side. Since its sides are equal you have:
S*S = 1.69
S^2 = 1.69
S = √(1.69)
S= 1.3 km
Hope this help :).
