I think the answer is 18 in
Answer:
(2x-5y)^2
Step-by-step explanation:
4x^2 - 20xy + 25y^2=
(2x) ^2 - 2(2x)(5y)+(5y)^2 =(*)
(2x-5y)^2
(*) A^2 - 2AB+B^2 =(A-B)^2
3
-90
1
30
2
If you need to show your work look at the picture
12 for $25 is $2.08 per each. 24 for $46 is $1.90 per each. 50 for $94 is $1.90 per each.