Parent volunteers at Wildgrove High School are processing yearbook order forms. Students have an option to get the basic yearbook or a deluxe option, which includes engraving and a protective cover. In Mrs. Whitehead's class, 23 basic yearbooks and 30 deluxe yearbooks were ordered, for a total of $4,091. The students in Mr. Copeland's class ordered 19 basic yearbooks and 21 deluxe yearbooks, for a total of $3,058. How much does each option cost?

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