3x-15=3x+15 please help ASAP

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?

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

Find the dimensions of the circle. area = 64π in.² r= in.