Question

Mr. Colby needs 22 chargers for a classroom computer cart. The cost per charger is constant. The table below shows the cost of different numbers of chargers at an electronics store.5 chargers cost $34.75.8 Chargers cost $55.60.15 chargers $104.25.

Answer 1

If the cost per charger is constant, let's find the price of each charger by dividing the total cost by the number of chargers in the three cases given:

$\begin{gathered} \text{price}=\frac{34.75}{5}=6.95 \\ \text{price}=\frac{55.6}{8}=6.95 \\ \text{price}=\frac{104.25}{15}=6.95 \end{gathered}$

So the price of one charger is $6.95. Now, to find the price of 22 chargers, we just need to multiply the price of one charger by the number of chargers:

$22\cdot6.95=152.9$

So the price of 22 chargers is $152.90