Looking for the sum of all the answers, also need to round the neatest tenth. I got 11 but somehow it was wrong

Quick translate "x is 12 units from 20" into an equation. what are the values of x being described? if you can answer any of my other questions that'd be great too

Find the slope of the line that contains the following points. r(-2, 4), s(6, -2)

Which measure is equivalent to 110 ml? 0.0110 l 0.110 l 1.10 l 11,000 l