Natalie budgets $146 for yoga training. She buys a yoga mat for $10 and spends at least $9 per day on yoga classes. Which inequality represents the number of days, d, on which Natalie can take classes?

The first thing we must do for this case is to define variables:

d = number of days

We then have the following inequality that represents the problem:

9d + 10 < = 146

Answer:

An inequality that represents the number of days, on which Natalie can take classes is:

9d + 10 < = 146