Find the lengths of DB and EC given the length of FB is 31.66 cm

For what value of jn is mn parallel to kl

Can someone me with this problem . show your work .

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?