Every 7th person who enters a store is given a survey to complete. Which type of sampling method is described in this situation? A. voluntary sample
B. convenience sample
C. simple random sampling
D. systematic random sampling

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?

Factor the expression using the gcf. the expression 21m−49n factored using the gcf

The graph shows the distance kerri drives on a trip. what is kerri's speed?