Step-by-step explanation:
Given

Also given

Lastly,

My guess is 9 hours, because since pipe a takes 12 hours and with pipe b it takes 9, it's 12-9=3
I think.
Part A
49-14 = 35
<span>35/7 = 5 </span>
Part B
5 miles each day
Part C
<span>49+35 = 84 </span>
<span>84+40 = 124, which is a good estimate and it is reasonable</span>
Answer:
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Step-by-step explanation:
9x^2-42x+49... Sorry if I'm too late!