Me because i don't understand how to do it.: )

In which source of water would a wave travel the fastest? o ice o cold o room temperature o hot mark this and return save and exit next

What is the slope of the line shown below?

Barney & noblet customers can choose to purchase a membership for $25 per year members receive 10% off all store purchases 1. how much would a member pay per year if he bought $50 worth of items each year? 2. write a slope-intercept equation that expresses how much a member pays per year using x to represent his purchases per year 3. how much would a member have to spend per year to pay off his membership fee?