Final answer:
To find Parker's weekly allowance, set up an equation with his allowance halved plus $4 equaling $12, solve for the allowance, and find that it is $16, which is option D.
Step-by-step explanation:
The question revolves around basic algebra and percentages to determine Parker's weekly allowance. Parker spends half of his allowance on a game and then earns an additional $4 by shoveling snow, which results in him having $12 at the end.
Let's denote Parker's weekly allowance as A. According to the problem, Parker spends half of his allowance, which is A/2, and then adds $4 from shoveling snow. Therefore, the equation representing this situation is A/2 + 4 = 12. To solve for A, we need to carry out the following steps:
- Subtract 4 from both sides of the equation: A/2 = 12 - 4
- Simplify the right side of the equation: A/2 = 8
- Multiply both sides of the equation by 2 to find A: A = 8 * 2
- Calculate the value of A: A = 16
Thus, Parker's weekly allowance is $16, which means the correct answer is option D.