Which is easier to find for a triangle on a graph - area or perimeter?

Determine whether the quadrilateral below is a parallelogram. justify/explain your answer (this means back it up! give specific information that supports your decision. writing just "yes" or "no" will result in no credit.)

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Use multiples to write two fractions equivalent to 7/9. 14/18, 8/10 6/8, 21/27 10/12, 28/36 14/18, 21/27