Question

10) Ms. Fredrick purchased a bottled water for $1.25 and 5 doughnuts.
The total cost was $7.00.

Write an equation, in the form of px + q = r, that represents the situation AND determine the cost of a single donut.

1 point: correct equation written.
1 point: correct answer provided.
2 points: correct work shown.

(4 points)

Answer 1

Let x = cost of one doughnut (in dollars).

Equation: 5x + 1.25 = 7

Work:
5x = 7 − 1.25 = 5.75
x = 5.75 ÷ 5 = 1.15

Answer: Each doughnut costs $1.15.