Question

Riley and her friends buy snacks at the movies. They buy 3 pretzels and 4 drinks for $17.50. The cost of a pretzel is the same as the cost of a drink. The situation can be represented by the graph and the system of equations shown, where p is the cost of a pretzel and dis the cost of a drink. I a. What is the cost of each pretzel? What is the cost of each drink? Show your work.​

Answer 1

Each costs $2.50

Explanation:

Given

• Cost of 3 pretzels and 4 drinks = $17.50
• p = d

Solving

• 3p + 4d = 17.50
• But, p = d
• 3d + 4d = 17.50
• 7d = 17.50
• d = $2.50
• ⇒ p = $2.50