Pain au chocolat dur main
Answer:
y=350(1.06)^x and 704
Step-by-step explanation:
Exponantial Function is y=ab^x. I plugged in 12 into x
Answer:
make Y the subject in eqn........ 1
y + 7 = 2x
y = 2x - 7...........eqn 3
put y = 2x - 7 into eqn 2
x² - xy + 3y² = 15
x² - x(2x - 7) + 3(2x - 7)(2x - 7) = 15
x² - 2x² + 7x + 3(4x² + 14x -14x + 21) = 15
x² - 2x² + 7x + 12x² + 42x - 42x + 63 = 15
x² - 2x² + 7x + 12x² + 63 = 15
x² - 2x² + 12x² + 7x + 63 = 15
11x² + 7x + 63 - 15 = 0
11x² + 7x + 48 = 0
11x² + 7x = - 48
11x²/11 + 7x/11 = - 48/11
x² + 7x
Answer:

Step-by-step explanation:
Given that,
The pH of the solution = 12.24
We need to find the H⁺ concentration of the solution. We know that,
![pH=-log[H^+]](https://tex.z-dn.net/?f=pH%3D-log%5BH%5E%2B%5D)
Put pH = 12.24
So,
![12.24=-log[H^+]\\\\\[H^+]=4.83\times 10^{-6}](https://tex.z-dn.net/?f=12.24%3D-log%5BH%5E%2B%5D%5C%5C%5C%5C%5C%5BH%5E%2B%5D%3D4.83%5Ctimes%2010%5E%7B-6%7D)
So, the concentration of H+ is
.