To set up a linear model for the situation, let's define the variables involved:
- Let \( x \) be the cost per apple.
- The fixed cost for the basket is $5.00.
- She picks 10 apples.
The total cost (C) can be expressed with the following formula: \[ C = \text{basket cost} + (\text{number of apples} \times \text{cost per apple}) \] Substituting the known values into the equation: \[ C = 5.00 + (10 \times x) \]
According to the problem, the total cost (C) is $7.50. Therefore, we can set up the equation: \[ 7.50 = 5.00 + (10 \times x) \]
To solve for \( x \), we first subtract the basket cost from both sides: \[ 7.50 - 5.00 = 10x \] \[ 2.50 = 10x \]
Next, divide both sides by 10 to solve for \( x \): \[ x = \frac{2.50}{10} = 0.25 \]
Thus, the cost per apple that Genesis has to pay is \( 0.25 \).
Finally, the answer as a whole number followed by a decimal and two digits is: \[ 0.25 \]