The booster club is selling refreshments. The following system of linear equations models the concession stand prices. Let epresent the cost of a hot dog and represent the cost of the soda. Write the answers in decimal form. Solve the system of linear equations.

To solve this system of linear equations, we first need to rewrite the second equation in terms of s:

7h - 55 = 15
7h = 70
h = 10

Now that we have the value for h, we can substitute it back into the first equation to solve for s:

4h + 4s = 10
4(10) + 4s = 10
40 + 4s = 10
4s = -30
s = -7.5

Therefore, the cost of a hot dog is $10 and the cost of a soda is -$7.50 (or $7.50 given the context of the problem).