Evaluate the square root of x+7 when x equals 9. write the answer in simplified radical form.

What is the simplified expression for 6(2(y+x))

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

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?