Lin earns $12 an hour. She wants to buy a new MP3 player. She is considering models that cost at least $84. Writ an inequality that describes how many hours Lin needs to work to be able to buy the player. Explain the answer.

12h > 84

12 times the number of hours is greater than $84

12h>84

The product of 15 and a number is no more than 90.

To find an inequality that describes how many hours Lin needs to work to be able to buy the MP3 player, we can use the fact that Lin earns $12 per hour and the cost of the MP3 player is at least $84.

Let's consider the number of hours Lin needs to work, which we'll represent as "x". Since Lin earns $12 per hour, the total amount she earns in "x" hours would be 12x.

The cost of the MP3 player is at least $84. We can represent this inequality as 12x >= 84.

To explain the answer, if Lin works "x" hours, she will earn 12 times "x" because she earns $12 per hour. So the amount she earns after working "x" hours is 12x.

To be able to buy the MP3 player, the amount Lin earns (12x) should be greater than or equal to $84, as the cost of the player is at least $84. This is why the inequality is 12x >= 84.

Solving this inequality will give us the minimum number of hours Lin needs to work in order to afford the MP3 player.