70 ! the graph shows the function f(x) = 2x. what is the value of x when f(x) = 8? a.2 b.1 c.0 d.3

How do i do this activity, is appreciated

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm