I'm not sure what you want with the first part (3/1=6/2)
well PEMDAS or parenthasees exponents, mult or division whichever comes first, addition subtraction, whichever comes first so
3-1/1 would be divison first
1/1=1
3-1=2
Step-by-step explanation:
By Completing the Square,

Since the first tern is at most zero, the maximum value occurs when

Answer:
Σ-47-15)
Step-by-step explanation:
Well you do 3.8% of $400 which is equal to 15.2 then you do 15.2 times 12 since there’s 12 months in a year and you’ll get 182.4 so that’s how much you’ll make in one year and since you wanna know for 11 years you times 182.4 times 11 then you’ll get 2,006.4 and since there was originally $400 in the account you do 2,006.40 + 400= $2406.40