Time out = d/so = d/523
time back = d/sb = d/415
t = time out + time back
11 = d/523 + d/415 find common deneminator
11 = (415d + 523d)/(523*415)
11*523*415 = 415d + 523d
2387495 = 938d
d = 2545 miles
hope this help
Answer:
(a) 
(b) 
Step-by-step explanation:
It is given that 
(a) We have given equation 



(b) 



Answer:
has it gone expired
Step-by-step explanation:
I believe A is the answer