Subtract: -10 - (-21)

In the 30-60-90 triangle below side s has a length of and side r has a length

The perimeter of a stage is 116 feet. it is 17 feet wide. how long is it?

Fanny mendelssohn manages all the magazines and paperback books at a local grocery store. she prices many paperbacks to sell at $7.99. the cost to the store is $5.29. what is the markup rate on a paperback book, based on its cost?