Algebra: Concepts & Connections Unit 1

a. Cost for 10 kids, [tex]a_{10} = \qquad[/tex]

b. Cost for 17 kids, [tex]a_{17} = \qquad[/tex]

c. Cost for 40 kids, [tex]a_{40} = \qquad[/tex]

10. How many kids would bring the total to [tex]$\$[/tex]273$? Explain your reasoning.

11. Complete the following table and graph the sequence.

\begin{tabular}{|c|c|c|c|c|c|c|c|}
\hline
\begin{tabular}{c}
Number \\
of Kids
\end{tabular} & 1 & 2 & 3 & 4 & 5 & & \\
\hline
\begin{tabular}{l}
Total Cost \\
in Dollars
\end{tabular} & & & & & \\
\hline
\end{tabular}



Answer :

Let's solve each part of the question step-by-step.

### Part a: Cost for 10 kids

To determine the cost for 10 kids, we will use the known cost per kid, which is [tex]$9.1. Therefore, the total cost for 10 kids is: \[ a_{10} = 10 \times 9.1 = 91 \] Thus, the cost for 10 kids is $[/tex]91.

### Part b: Cost for 17 kids

Similarly, for 17 kids, the total cost can be calculated as follows:

[tex]\[ a_{17} = 17 \times 9.1 \][/tex]

[tex]\[ a_{17} = 154.7 \][/tex]

Therefore, the cost for 17 kids is [tex]$154.7. ### Part c: Cost for 40 kids Using the same method for calculating the total cost for 40 kids: \[ a_{40} = 40 \times 9.1 \] \[ a_{40} = 364 \] Hence, the cost for 40 kids is $[/tex]364.

### Part 10: Number of kids to bring the total to [tex]$273 We are asked how many kids would bring the total cost to $[/tex]273. We already know that each kid costs [tex]$9.1. To find the number of kids, we divide the total cost by the cost per kid: \[ \text{Number of kids} = \frac{273}{9.1} \] \[ \text{Number of kids} = 30 \] Therefore, 30 kids would bring the total cost to $[/tex]273.

### Part 11: Complete the table and graph the sequence

Let's fill in the provided table with the number of kids and their corresponding total costs. We already have the cost values for 1 to 5 kids.

[tex]\[ \begin{tabular}{|c|c|c|c|c|c|c|c|} \hline \begin{tabular}{c} Number \\ of Kids \\ \end{tabular} & 1 & 2 & 3 & 4 & 5 \\ \hline \begin{tabular}{l} Total Cost \\ in Dollars \\ \end{tabular} & 9.1 & 18.2 & 27.3 & 36.4 & 45.5 \\ \hline \end{tabular} \][/tex]

To graph the sequence, you would plot the number of kids along the x-axis and the total cost in dollars along the y-axis. Each point on the graph corresponds to a pair (Number of Kids, Total Cost). For instance:
- (1, 9.1)
- (2, 18.2)
- (3, 27.3)
- (4, 36.4)
- (5, 45.5)

Connecting these points will show a linear relationship since the cost per kid remains constant at $9.1.