Terrance and jesse are training for a long distance race. terrance trains at a rate of 6 miles every half hour and jesse trains at a rate of 2 miles every 15 minutes. what is the unit rate in miles per hour for each runner?

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?