ANSWER:
It is letter B. because plus the 7 and 2= 9 and we cant see a whole number so it dosent have 1 so I am very sure about my answer
Answer:

Step-by-step explanation:
let the diagonal be d
using the pythagoras theorem,


which in radical form is

1 and 146
2 and 73
and that's about it
Since x+y equals 5 that means x is 3 and y is 2 because 3+2=5. So now plug it in, 2(3)+3(2). Two multiplied by three is 6 and three times two is 6. So now it’s 6+6 which equals 12. So it’s 2(3)+3(2)=12