Can someone me with these 4 ? show work , and you : )

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?

Through non-collinear points there is exactly one plane.

For what values of a is the sum of the fractions 2a−1 / 4 and a−1 /3 positive?