![\begin{array}{ccccllll} &amount(ltr)&\textit{acid \%}&\textit{total acidic amount(ltr)}\\ &------&------&------------\\ \textit{5\% sol'n}&x&0.05&0.05x\\ \textit{25\% sol'n}&y&0.25&0.25y\\ ------&------&------&------------\\ \textit{10\% mixture}&10&0.10&1.00 \end{array}](https://tex.z-dn.net/?f=%5Cbegin%7Barray%7D%7Bccccllll%7D%0A%26amount%28ltr%29%26%5Ctextit%7Bacid%20%5C%25%7D%26%5Ctextit%7Btotal%20acidic%20amount%28ltr%29%7D%5C%5C%0A%26------%26------%26------------%5C%5C%0A%5Ctextit%7B5%5C%25%20sol%27n%7D%26x%260.05%260.05x%5C%5C%0A%5Ctextit%7B25%5C%25%20sol%27n%7D%26y%260.25%260.25y%5C%5C%0A------%26------%26------%26------------%5C%5C%0A%5Ctextit%7B10%5C%25%20mixture%7D%2610%260.10%261.00%0A%5Cend%7Barray%7D)
so.. whatever the sum of "x" and "y" is, it must come with a 10Liter
solution of 10% or 10/100 = 0.10 acidity
thus
![\bf \begin{cases} x+y=10\\ 0.05x+0.25y=1.00\\ --------------\\ x+y=10\to x=\boxed{10-y}\\ --------------\\ 0.05(\boxed{10-y})+0.25y=1.00 \end{cases}](https://tex.z-dn.net/?f=%5Cbf%20%5Cbegin%7Bcases%7D%0Ax%2By%3D10%5C%5C%0A0.05x%2B0.25y%3D1.00%5C%5C%0A%20--------------%5C%5C%0A%20x%2By%3D10%5Cto%20x%3D%5Cboxed%7B10-y%7D%5C%5C%0A%20--------------%5C%5C%0A%200.05%28%5Cboxed%7B10-y%7D%29%2B0.25y%3D1.00%0A%5Cend%7Bcases%7D)
solve for "y" to see how much of the 25% solution must be used,
how much "x" will it be? well x = 10 -y :)
Answer:
2,5 and 6
Step-by-step explanation:
The answer is going to be option 2, 5 and 6 because the line touches -4,2 and 4 on the x axis. And these are the x values so that's why this is going to be the answer.
Hope this information helps you!
35x -10y=-120
10x +10y= 30
45x=-90
x=-2
5(-2)+5y=15
-10+5y=15
5y=25
y=5
(-2,5): the answer is b
None of the factors shown will give you the above number. In order to get the numbers that are on top, you would need two x's being multiplied by each other to get the x^2 value. Since none of the options have that, it is impossible to achieve that.
Answer:
4.796
Step-by-step explanation: