Question

the two lines y= 2x+8 and y=2x-12 intersect the x axis at P and q. work out the distance of pq?

Answer 1

Use the slope intercept form: y=mx+b
You know that (0,5) is part of the line and can be represented as (x,y)
You know that gradient(aka slope) is -4. In the form, m=slope.
Substitute that all in and you only have one unknown variable:b.
Find b and then put only m and b into the y=mx+b and that's your answer.

Answer 2

Yes? No?

Answer 3

-4 and 6
so totall distance will be 10

Answer 4

Did you seriously edit the question to a completely different one? Next time, please close this question and then ask a new one.