Can someone in math
1. simplify the expression 8 squared plus 9 left parenthesis 12 divided by 3 times 2 right parenthesis minus 7. explain each of your steps.
2. using the numbers and symbols, solve
7x = 42

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