A. 48 = 12 + 20 + x
If you use this equation then you can do 12 + 20 = 32 and then you can do 48 - 32 = 16 so x = 16
112.5$ ..
for the 12 visors if you divide 90 by 12, you get 7.5 which is the total cost of one visor. 7.5(one hat) x 15 visors gives you 112.5 so the total cost will be 202.5
(3/20) x 3 (4/15) x4
9/60 + 12/60
= 21/60
=7/20
