Answer:
45 or positive 45
Step-by-step explanation:
The length is going to be 15.5. Please message me if you want the explanation
X/x+9 (original fraction)
x+1/ x+10 = 4/13
x+1=4 so x=3 and x+10=13 so again x=3
now that you have the value of x, substitute it into the original fraction to get:
3/12
The 2nd option is correct