Y=-x^2+12x-5 given that h=-b/2a and k =4ac-b2/4a

Find the domain of the following expression: 1/(√x)-2

Erinn wrote the equation –5x + 4y = 32 to represent her hourly wage (y) and how this wage has changed during each year that she worked at a company (x). what is the rate of change in erinn's hourly wage per year?

The candy store is having a 30% off sale. emma is going to buy $7.50 worth of candy.how much will she pay after the discount