Acity library has 811 nonfition books they want to divided the books on a shelf by 79 each

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

Solve each quadratic equation by factoring and using the zero product property. [tex]x^2+6x+8=0[/tex]

Ihave a triangle with a 60 degree angle. lets use d for that angle. what are the values of e and f if d is 60 degrees? and what do you notice about the values of e and f?