She is buying 4 paint tubes. 4 x 8.5 = 34. 34 - 20 = 14, which is less than 54.
I don't really know if this is correct but I think it is x+y+z=14
Where are the number line choices!?
Start finding the slope of the line

using one of the points find the intercept and the standard form

the equation of the line is
He gets paid 24 dollars an hour 960/40=24