Question

Robyn makes and sells homemade bracelets she made $87.25 last week this wee. She donated some bracelets to charity so her profit at the end of this week can be represented by -$12.50.

Part A
Write a subtraction and addition expression to represent Robyns total profit for the two weeks combined.
Part B
Write an expression for the difference between last week profit and this weeks profit.
What is the difference in dollars between last weeks profit and this weeks profit.

Answer 1

Robyn's total profit for the two weeks is calculated by summing up her earnings and losses ($87.25 + (-$12.50)). The difference between her profits for the two weeks is found by subtracting this week's loss from last week's profit, resulting in $99.75.

Step-by-step explanation:

Part A: Total Profit Calculation

To calculate Robyn's total profit for the two weeks combined, we need to add her profit from the first week to her profit from the second week (even though it's a negative number this second week, which signifies a loss). The subtraction expression would look like $87.25 - $12.50, representing her profit minus her loss. The addition expression, which is more conventional in this context, would be $87.25 + (-$12.50) as we are summing the two weekly profits.

Part B: Difference in Weekly Profits

To find the difference between last week's profit and this week's profit, we subtract this week's profit from last week's profit, which gives us the expression $87.25 - (-$12.50). When calculating this, you must remember that subtracting a negative is the same as adding. Therefore, the difference in dollars between last week's profit and this week's loss is $87.25 + $12.50, which equals $99.7