A correct possibility could be $37.50 because 37.50 x 2 + 4 = 79
Answer:
Step-by-step explanation:
Side Original length Copy length
a 4 1 
b 6 1.5 
c 20 5 
d 16 4 
Bruh this is not a question
The only other possible meaning I can see is that a2 + b2 means a^2 + b^2. In the case that is a formula that cannot be simplified further, although it could be written as (a + b)^2 - 2ab or (a - b)^2 + 2ab. ... Originally Answered: What is the formula of a2+b2?