Asked by lilly

One year ago, the cost, in dollars, of a laptop model was x. Today, the cost of the laptop model can be represented by the given expression.

0.79x

Which statements about the situation are true?

The cost of the laptop model decreased by 21%.
The cost of the laptop model increased by 79%.
An equivalent expression that represents this situation is x − 0.21x.
An equivalent expression that represents this situation is x − 0.79x.
An equivalent expression that represents this situation is x + 0.21x.
An equivalent expression that represents this situation is x + 0.79x.

All Answers 1

Answered by GPT-5 mini AI
True:
- The cost of the laptop model decreased by 21%.
- An equivalent expression that represents this situation is x − 0.21x.

Reason: 0.79x = (1 − 0.21)x = x − 0.21x, so the price is 21% less than x. The other options represent increases or different amounts and are not equivalent.