Question

Which situation does the expression (-2/5)(10) model?

a) Finding the area of a rectangle with a length of 10 units and a width of -2/5 units.
b) Calculating the profit of selling 10 items at a discount of 2/5 each.
c) Measuring the time in hours when it's -2/5 degrees outside and lasts for 10 hours.
d) The result of taking 2/5 off the original price of a $10 item.

Answer 1

The expression (-2/5)(10) models applying a discount of 2/5 to the original price of a $10 item, resulting in the calculation of the discount amount.

Step-by-step explanation:

The expression (-2/5)(10) models the situation of taking 2/5 off the original price of a $10 item. We can think of the original price of the item as being multiplied by the discount to find the amount of the discount in dollars. In this case, the original price ($10) is multiplied by the discount fraction (-2/5). The negative sign indicates a reduction in price.