Question

The cost of 3 hamburgers and 4 orders of fries is $21.85. The cost of 4 hamburgers and 6 orders of fries is $30.80. Which pair of equations could be used to determine, h, the cost of a hamburger, and f, the cost of an order of fries?

Answer 1

The equation that can be used to determine, h, the cost of a hamburger, and f, the cost of an order of fries is

3h + 4f = 21.85

3h + 4f = 21.854h + 6f = 30.80

How to write simultaneous equation

Let

• h = the cost of a hamburger
• f = the cost of an order of fries

The equation:

3h + 4f = 21.85

4h + 6f = 30.80

Therefore, the correct answer is option A

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