Find the circumference of the given circle

F(x)= 4x g(x) =x-1 what is f(x) divided by g(x)

Two numbers have a sum of -19. one number is x. what expression represents the other number?

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap