Question

y=5x-18 ... 2x+10y+10=0 .... determine what the graphs are whether be parrel ,coinciding , perpendiucalar or none

Answer 1

write the 2nd equation in slope intercept form then look atthe slope.
parallel have same slope
perpendicular. multiply both slopes together andu will get -1
if neither then they r coinciding

Answer 2

also consider the case where they are the same line! not likely

Answer 3

5x - y - 18 = 0

2x+10y+10 = 0

5 -1
-- ╪ ---
2 10

so, they will intersect each other and will have a unique solution...