If 1+1 =2
then what does 2+1=?

If a and −a are numbers on the number line, which expression must give the distance between them? a) 0 b) a c) |2a| d) |a|

Which number is located at point a on the number line? a number line is shown from negative 10 to 10 with each interval mark on the number line representing one unit. point a is labeled one interval mark to the right of negative 5.

Find the length of the radius of a circle with the center at -7+2i and a point in the circle at 33+11i