The speed of a stream is 2 mph. a boat travels 4 miles upstream in the same time it takes to travel 8 miles downstream. what is the speed of the boat in still water?

Can someone me with the property questions for 12 13 and 14 plz

Ateacher wanted to buy a chair, a bookshelf, two tables and a desk. she spent $900 for all five items and the chair and the desk combined 70% of her total. if the bookshelf cost $50, how much did each of the tables cost?

Run a linear regression to determine an equation (y=mx+b y=mx+b)