The answer is √
65 and the decimal form is 8.06
The answer for this question is 13/5 greatre than 1.9
Answer:
1/3 or 0.3 (recurring)
Step-by-step explanation:
Let's substitute our numbers into the equation.
27 = 9x + 24 I multipled 8 by 3 in order to get 24, because x equals 3.
Now take away 24 leaving 9x on its own.
3 = 9x
Divide 9 to separate it from x.
3/9 = x
Simplify the fraction.
1/3 = x
Because there is more than two y values for x = 1
Recall your d = rt. distance = rate * time.
let's say the speed of the current is "c".
keeping in mind that, when the boat is going against the current, the boat is not really going at 2kmh, but instead at " 20 - c ", because the current is subtracting speed from it.
Likewise when is going with the current, is going at a speed of " 20 + c ".
if the boat took say "t" hours on the way over, on the way back it took the slack from the whole 8 hours and "t", namely it took " 8 - t " hours.
![\bf \begin{array}{lccclll} &\stackrel{km}{distance}&\stackrel{kmh}{rate}&\stackrel{hours}{time}\\ &------&------&------\\ \textit{against the current}&20&20-c&t\\ \textit{with the current}&180&20+c&8-t \end{array} \\\\\\ \begin{cases} 20=(20-c)(t)\implies \frac{20}{20-c}=t\\ 180=(20+c)(8-\stackrel{\downarrow }{t})\\ --------------\\ 180=(20+c)\left( 8- \stackrel{\downarrow }{\frac{20}{20-c}}\right) \end{cases} \\\\\\ 180=(20+c)\left( \cfrac{(160-8c)-20}{20-c} \right)](https://tex.z-dn.net/?f=%5Cbf%20%5Cbegin%7Barray%7D%7Blccclll%7D%0A%26%5Cstackrel%7Bkm%7D%7Bdistance%7D%26%5Cstackrel%7Bkmh%7D%7Brate%7D%26%5Cstackrel%7Bhours%7D%7Btime%7D%5C%5C%0A%26------%26------%26------%5C%5C%0A%5Ctextit%7Bagainst%20the%20current%7D%2620%2620-c%26t%5C%5C%0A%5Ctextit%7Bwith%20the%20current%7D%26180%2620%2Bc%268-t%0A%5Cend%7Barray%7D%0A%5C%5C%5C%5C%5C%5C%0A%5Cbegin%7Bcases%7D%0A20%3D%2820-c%29%28t%29%5Cimplies%20%5Cfrac%7B20%7D%7B20-c%7D%3Dt%5C%5C%0A180%3D%2820%2Bc%29%288-%5Cstackrel%7B%5Cdownarrow%20%7D%7Bt%7D%29%5C%5C%0A--------------%5C%5C%0A180%3D%2820%2Bc%29%5Cleft%28%208-%20%5Cstackrel%7B%5Cdownarrow%20%7D%7B%5Cfrac%7B20%7D%7B20-c%7D%7D%5Cright%29%0A%5Cend%7Bcases%7D%0A%5C%5C%5C%5C%5C%5C%0A180%3D%2820%2Bc%29%5Cleft%28%20%5Ccfrac%7B%28160-8c%29-20%7D%7B20-c%7D%20%5Cright%29)