Please help me with math!

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?

Twelve less than a number is at most 20

What is the area of a triangle with vertices at (-3 3) (-3,2) and (1,2)?