HELP PLEASEEE YOULL GET 15 POINTS Convert 25 kilometers ran in 10 hours to a unit rate. Use the label kilometers per hour (kph).

What is the value of m in the equation 1/2 m - 3/4n=16 when n=8

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?

Need solving this 2nd limit problem.