There are 6 identical blackboards that are to be distributed amongst 3 schools. how many divisions are possible?

Ineed with number 17 i don’t get it at alll

Problem melissa is her dad build a walkway in their backyard. the walkway will be 54 feet long and 1.5 feet wide. the local hardware store sells tiles which are 1.5 by 1.5 feet and come in boxes of 12. how many boxes of tiles do they need?

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?