How many solutions does the system of equations have?

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?

An ulcer medication has 300 milligrams in 2 tablets. how many milligrams are in 3 tablets?

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?