Section: Math 0 Likes
On Monday, Elsa put $40 in her empty lockbox. Each following Monday (April 2022 - Z08)
On Monday, Elsa put $40 in her empty lockbox. Each following Monday, Elsa will deposit $18 to her lockbox.
Which of the following expressions gives the number of dollars in Elsa’s lockbox after Elsa’s deposit w weeks from now?
A. 40 + 18w
B. 40 − 18w
C. 40w + 18
D. 40w − 18
E. (40 + 18)w
Solution
Correct answer: A. 40 + 18w.
To find the number of dollars in Elsa's lockbox after w weeks, we need to consider the initial deposit of $40 and the additional $18 she deposits each week.
After the first week, she will have 40 + 18 dollars.
After the second week, she will have 40 + 18 × 2 dollars.
After the third week, she will have 40 + 18 × 3 dollars.
And so on.
So, the expression that represents the number of dollars in Elsa's lockbox after w weeks is:
40 + 18w
Exam Edition: April 2022 - Z08
Exam Year: 2022
Related topics: Algebra, Arithmetic, Patterns and sequences