Can I get help with understanding this?

Use the distributive law to multiply. 3(4x + 5y + 6)

Sum is 17 and their difference is 3

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?