36 and 48
a = b+12
a+b = 84
(b+12) + b =84
2b +12 = 84
2b = 72
b= 36
a = b + 12
a = 36 + 12
a = 48
$320 5 times 20 is 100 so you have to times 16 by 20 to get the total 100% of the video game system
Here you go let me know if you have questions
Both diameter and height are scaled by 2.5.
Area is measured in squared units ( square centimetres).
Square the scale factor:
2.5^2 = 6.25
Multiply the area of the smaller vase by the scale:
2826 x 6.25 = 17,662.5 square cm.
First you had to remove parenthesis first.
Multiply by the numbers.
Final answer 
Hope this helps!
And thank you for posting your question at here on brainly, and have a great day.
-Charlie
