The sale price of a wedding cake after being discounted 20% is $315.60. Write an equation you can use to find the original cost of the wedding cake c?

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

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?

How do newtons third law of motion demonstrates on a rollar coster