Answer:
17 hot dogs
Explanation:
To solve write a system of equations, two lines that relates hot dogs and drinks.
The first equation tells how many:
x + y = 29
The second equation tells how much money:
Hot dogs cost $2 each so their cost is 2x.
Drinks cost $3 each so their cost is 3x.
Together their cost is 2x+3y and is $70.
2x+3y=70
To solve, graph each equation and find their intersection. The point of intersection is the number of hot dogs and drinks purchased.