What is 30% of 1/2 of 20?

If a is a nonzero real number then the reciprocal of a is

(! ) the figure below shows parallelograms abce, pqrs, and tnlm on a coordinate plane. points s, p, q, and r are midpoints of abce t, n, l, and m are midpoints of pqrs write the equation of line ml. show your work.

Show that if a, b, and c are real numbers and a 0, then there is a unique solution of the equation ax +b = c