a store sells hard cover books for $8 and paper back books for $5. you buy 7 books, represented by the equation x+y=7, where x is the number of hardcover books and y is the number of paperback books. the equation 8x+5y=44 represents the total cost. how many of each type of book did you buy?

2y= 3 2 x−2 y = − 1 3 x + 1 y=− 3 1 x+1

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have

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