Find the missing side length in the attached image

To determine the number of deer in a forest a forest ranger tags 280 and releases them back

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

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?