Recent content by Rron

Homework Statement A solution is prepared by mixing 200 mL of 0.2 M CH3COOH with 100 mL of 0.1 M of NaOH solution.Calculate the pH of the solution.(Ka=1.8x10^-5) I really don't know how to start this, so please help me.Its going to be a similar one on my exam tomorrow. Thanks.

A solution is prepared by mixing 200 mL of 0.2 M CH3COOH with 100 mL of 0.1 M of NaOH solution.Calculate the pH of the solution.(Ka=1.8x10-5) I really don't know how to start this, so please help me.Its going to be a similar one on my exam tomorrow. Thanks.

Homework Statement An aneurysm is an abnormal enlargement of a blood vessel such as the aorta. Suppose that, because of an aneurysm, the cross-sectional area A1 of the aorta increases to a value A2 = 1,7A1. The speed of blood, with average density of 1060 kg/m3, through a normal portion of...

A very logical problem. Homework Statement x5y=3z and x3y=z2-3z-2 so what is (z)xy Homework Equations No equations, just multiplication,division etc. The Attempt at a Solution let xy=a a^5=3z we can write this as a^15=(3z)^3 a^3=z^2-3z-2 also this a^15=(z^2-3z-2) and then...

Yeah I know that.-1 and 9 but forgot to tell you that I got some choices: A)-1 B)-2 C)-3 D)-4

Curios3141 thank you so much finally solved it. The answer is -1.

That's a piece of cake man. a^2x+ab+b

Sorry but still nothing. Maybe it is because I learned these a long time ago. It actually has been 3 years since I last solved a function problem like this. So can you please show me the way that you solved this problem in order to save time struggling with the problem and then at the end...

this is what i tried: if f(x)=ax+b then f(2)=2a+b I substituted f(x) in f(f(x)) with ax+b so it becomes f(ax+b)=4x-15 Now ax+b=2 so from this x=2-b\a so if u substitute x in the equation above f(2)=4(2-b\a)-15 then I equalized 4(2-b\a)-15=2a+b, but from this u can't get anything.

Curios3141 thanks but couldn't get anything. Tried a lot.

Homework Statement We have f(f(x))=4x-15 , what is f(2)? Homework Equations Don't know. The Attempt at a Solution Don't know how to start actually!