What are the solutions to the equation 9x^2=49?
round to the nearest tenth.
a. 2.3, -2.3
b. 5.4, -5.4
c. 7, -7
d. 21, -21

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