Question

21. When Brooke buys lunch at the cafeteria,

Answer 1

Answer:

The amount in Brooke's lunch account change by the end  of that week is $-20 or $20 decrease.

Step-by-step explanation:

Consider the provided information.

Each day Brooke buys lunch and withdrawn the same amount i.e $4.

The number of days are 5.

To calculate the change by the end  of that week, find the total amount withdrawn in 5 days.

To represent withdrawn use a negative sign.

$5(-4)$

The product of the numbers will be a negative number as they have opposite sign.

$5(-4)=-20$

Hence, the amount in Brooke's lunch account change by the end  of that week is $-20 or $20 decrease.

Answer 2

Answer:

The amount in Brooke's lunch account changed by negative $20 dollars by the end of the week.

Step-by-step explanation:

First, let's look at what we know. Each day, she spends 4 dollars on lunch. In a school week, there are 5 days. With this info, we know that she spent 4 * 5 = $20 at the end of the week in total.

If her balance was $28 dollars at the start of the week, and she spends $20, then she has 28 - 20 = $8 dollars left at the end of the week.