What is the sum?
4x+1/x+2 + x-1/3x

C.

Explanation:

Since both fractions don't have the same denominator, we have to make them with the same denominator before we can actually do the addition.

So, here's the initial problem:

To make them with the same denominator, we'll multiply each side by 1, using the denominator of the other part... like this:

Since we multiply by 1 (expressed differently, but still just 1), the numbers aren't really changed.

Then we make the multiplications, first part:

Now the second part:

We now have both sides of the addition with the same denominator, and we can add the numerators.

We also simplified the denominator at the end, by extracting the 3 which was common.

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l