Is this a function or not

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?

Tan198=asin164=? how to solve this? ?

Look at the chart showing the results of a baseball player at bat. which is the probability of getting a hit?