Question

read the word problem below

a parking garage charges \\$3 for each of the first three hours. after three hours, the charge is \\$7 per hour. what is the total cost for five hours of parking?

which strategy would help solve this word problem?

• write the equation \\( (3 \times \\$3) + (5 \times \\$7) = \text{total cost of five hours} \\)
• write the equation \\( (3 \times \\$3) + (2 \times \\$7) = \text{total cost of five hours} \\)
• write the equation \\( (3 \times \\$3) \times (5 \times \\$7) = \text{total cost of five hours} \\)
• write the equation \\( (5 \times \\$3) - (3 \times \\$7) = \text{total cost of five hours} \\)

Explanation:

Calculate the cost for the first three hours

$$ 3 \times \$3 $$

Calculate the cost for the remaining hours

$$ (5 - 3) \times \$7 = 2 \times \$7 $$

Formulate the total cost equation

$$ (3 \times \$3) + (2 \times \$7) = \text{total cost of five hours} $$

Answer:

• Write the equation \((3 \times \$3) + (5 \times \$7) = \text{total cost of five hours}\)
• Write the equation \((3 \times \$3) + (2 \times \$7) = \text{total cost of five hours}\) (Correct answer)
• Write the equation \((3 \times \$3) \times (5 \times \$7) = \text{total cost of five hours}\)
• Write the equation \((5 \times \$3) - (3 \times \$7) = \text{total cost of five hours}\)