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Compare the values of [tex]\(y\)[/tex] for the months of January and December.

[tex]\[
\begin{array}{l}
\text{January: } y = 141.61 \\
\text{December: } y = 75.90
\end{array}
\][/tex]

Karina solves the system using linear combination and arrives at the equation [tex]\(116y = 96.28\)[/tex]. She then solves this equation for [tex]\(y\)[/tex]. Which statement explains Karina's solution?

A. The cost of natural gas is [tex]\(\$ 0.17\)[/tex] per unit.
B. The cost of natural gas is [tex]\(\$ 0.20\)[/tex] per unit.
C. The cost of natural gas is [tex]\(\$ 0.72\)[/tex] per unit.
D. The cost of natural gas is [tex]\(\$ 0.83\)[/tex] per unit.


Sagot :

To determine which statement correctly explains Karina's solution, we need to solve the equation [tex]\( 116y = 96.28 \)[/tex] for [tex]\( y \)[/tex]. Follow these steps:

1. Understand the Equation:
- The given equation is [tex]\( 116y = 96.28 \)[/tex], which indicates that 116 units at the cost of [tex]\( y \)[/tex] per unit total [tex]$96.28. 2. Isolate \( y \): - To find \( y \), we need to isolate it by dividing both sides of the equation by 116. 3. Divide Both Sides: - \( y = \frac{96.28}{116} \). 4. Calculate \( y \): - When you divide 96.28 by 116, the result is \( y = 0.83 \). 5. Interpret the Result: - This means that the cost of natural gas is $[/tex]0.83 per unit.

Thus, the correct statement is:
- The cost of natural gas is \$0.83 per unit.
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