HELP!!

Determine the domain of the function (f0g)(x) where f(x)= 1/x+3, g(x)=2/x

Select the quadratic that has root x = 8 and x = -5

Select the correct answer from each drop-down menu. the length of a rectangle is 5 inches more than its width. the area of the rectangle is 50 square inches. the quadratic equation that represents this situation is the length of the rectangle is inches.

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi