Question

"Last week, it rained x inches. This week, the amount of rain decreased by 5%. Which of the following expressions represents the amount of rain that fell this week?"

Which expression represents the amount of rain that fell this week, given a decrease of 5%?

a) X + 0.05
b) X(0.05)
c) X - 0.05

Answer 1

The expression that represents the amount of rain that fell this week, given a decrease of 5%, is X - 0.05X. To calculate the amount of rain that fell this week, subtract 5% of the original amount of rain from the original amount.

Step-by-step explanation:

The expression that represents the amount of rain that fell this week, given a decrease of 5%, is X - 0.05X.

To calculate the amount of rain that fell this week, you need to subtract 5% of the original amount of rain from the original amount. This can be written as X - 0.05X, where X represents the amount of rain last week.

For example, if it rained 10 inches last week (X = 10), the amount of rain that fell this week would be 10 - 0.05(10) = 9.5 inches.