Answer:
40 14/25 years
Step-by-step explanation:
Well, this certainly is fun.
First, to find the fraction of the doctor's life which 13 years represents, subtract the fractions from 1 (and in this case l stands for lifetime):


So, multiply this equation by the reciprocal of 25/78 to isolate one of l:

years
Angle F is equal to angle G so 5x + 18 = 7x-12 so you would solve for x which would equal 15
The answer would be 71.45
20 because 19 16/33 is the exact answer. Since they ask about how much that can be rounded up to 20
19 is the answer 4+5(3)= 4+15=19