Let B be the number of biscuits in the box and t be the number of days since opening the box.
Since Anchor always gets three biscuits a day, the number of biscuits left in the box per day is B - 3t.
After 10 days, the number of biscuits left in the box is B - 3(10).
Therefore, the equation to represent the number of biscuits left in the box as a function of time is B - 3t = 106.
Bryan bought a box of biscuits for his dog, Anchor. Anchor always gets three biscuits a day. At the start of the tenth day after opening the box, Bryan counts 106 biscuits left in the box. Write an equation to represent the number of biscuits left in the box as a function of the time, in days. Be sure to define your variables.
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