Coach DeCaro records the cross country runners times compared to their personal best times

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.)

Evaluate the expression for the given value of the variable 7a - 4a for a =8

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5