Alan

I think you mean LCM and HCF

LCM = lowest common multiple (or least common multiple)

HCF = highest common factor

So, the LCM of 4 and 6, say is 12,  because multiples of 6 are 6, 12, 18 ... and multiples of 4 are 4, 8, 12, 16 ...

The lowest one in common is 12.

The HCF of 8 and 12 is 4 because the factors of 8 are 1, 2, 4, 8 and the factors of 12 are 1, 2, 3, 4, 6, 12.

The highest one in common is 4. 

What do you want to know? The amount by which it dropped?  If so, it's 6 - (-5) = 6 + 5 = 11 degrees Celsius

It's a number or expression that divides exactly into some other number or expression.

For example, 4 is a factor of 12.

x+1 is a factor of x²-1

x² + 7x - 60 can be factored into (x-5)*(x+12)

if the sides of a triangle are of length a, b and c, and the angles opposite these sides are labelled A, B and C respectively, then the cosine rule says:

$$a^2=b^2+c^2-2\times b\times c\times cosA$$

Yes, you've included them all now.

The lift coefficient is 

$$C=\frac{L}{\frac{1}{2}\rho v^2 A}$$

Where L is the take-off weight (0.92*347452*9.81N), v is its take-off speed, A is its wing area and ρ is the air density (you didn't give that, so you'll need to look it up using the temperature and pressure).

Yes, go ahead and edit it if you want to.

Just an incomplete answer rosala.