Question

Lisa is trying to save for a new computer that costs $1,299.99. She already has $347.62, and she can save $78 dollars a week from her job. How many weeks will she need to save for in order to buy the computer? Write an equation with the variable "w" to represent the situation.

Answer 1

Lisa needs to save for 13 full weeks to have enough money to buy a $1,299.99 computer, since she can save $78 per week and already has $347.62.

Step-by-step explanation:

Lisa is saving for a new computer that costs $1,299.99. She already has $347.62 saved. To find out how many weeks she will need to save $78 per week from her job to purchase the computer, we can set up the following equation with the variable w representing the number of weeks:

w = (total cost of the computer - amount already saved) / amount saved per week

w = ($1,299.99 - $347.62) / $78

After calculating:

w = $952.37 / $78 ≈ 12.21

Since Lisa cannot save for a fraction of a week, she would need to save for 13 full weeks to have enough money to buy the computer.