Please help me solve this

i think the answer is b x = 1, y = 35/2

the answer is b to that question

answer: $53750

steps:

list the principal and interest after the n-th year:

n       principal   simple interest

1     12500     375

2     25000     750

3     37500     1125

4     50000     1500

sum: $50000     $3750

total at end of year 4: $53750

c

step-by-step explanation:

if u do the hyposyntical mathematics using the mahabartha formula you will get the answer which equals c