We use the formula : Displacement = Average Velocity * Time ;
17 = ( v + 8 ) * t ;
1 = ( v - 8 ) * t ;
where v = the velocity of the boat; t is the time from expression " ... in the same amount of the time he rows ....."
Then 17 / 1 = (v + 8) / ( v - 8 ) ;
v + 8 = 17( v - 8 );
v + 8 = 17v - 136 ;
144 = 16v ;
v = 144 / 16;
v = 9 mph ;
18 = 9 * x ;
x = 18 / 9 ;
x = 2 hours ;
The answer is 2 hours ;
To simplify this:

You can factor the denominator and then cancel out some terms. But, this is not factorable. So, I think you are missing a term or you wrote this wrong.
Answer:
Answer H.
Step-by-step explanation:
3 TIMES 2 = 6 + 2 = 8 + 299999999999999999999999 = 300000000000000000000007.
Hope I helped
To answer this you would divide 52 by 2.60 which is 20,
So, 28 / 20 = 1.40,
So the answer is $140 sales tax.
Hope this helps.