B. (3x + 2) + (4y +3)
c. (2x +1) + (4y +3)
d. (4y +3) + 4
e. (3x +2) + 5x
f. (4y +3) + 5x
answer in simplest form by combining like terms

im not sure

step-by-step explanation:

inverse operation of addition

my dear correct answer is option number 3

answer:

at time x=0 we have 1000, at time x=1 we have 2000, at time x=2 we have 4000.  

so that's an initial value of 1000 and a ratio of 2,

y = 1000 (2^x)

hope this !