If the four lines are extended, which system would have only one solution? On a coordinate plane, lines a and b would intersect. Lines c and d are the same line. line a and line b line b and line c line b and line d line c and line d

An unknown number x is at most 10. which graph best represents all the values of x? number line graph with closed circle on 10 and shading to the right. number line graph with open circle on 10 and shading to the right. number line graph with open circle on 10 and shading to the left. number line graph with closed circle on 10 and shading to the left.