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Model practical situations with linear relations

Question 1 of 8

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A fictional order has a fixed charge of $29 plus $4 for each item. There are no other charges

Let $n$ be the number of items and $C$ the total charge in dollars. The stated rule includes the fixed charge when the item count is zero

Use this model only for $0\le n\le 28$, with whole-number item counts only

Required output, measured in dollars: $C=137$

Separately test whether $n=45/2$ is allowed by the stated input domain