Six less than twice a number , x, is 39. what is the value of x

Acircle has a circumference of 2 pi cm. which statement about the circumference and area is true? a comparison of the area and circumference is not possible since the area cannot be determined. the numerical values of the circumference and area of the circle are equal. the numerical value of the circumference is greater than the numerical value of the area. the numerical value of the circumference is less than the numerical value of the area.

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)