Let's represent the number of pennies Kehlani has with "p" and the number of nickels with "n".
To write the situation as an inequality, we need to express that Kehlani has at least 20 coins.
The total number of coins Kehlani has is p + n. So, the inequality can be written as:
p + n ≥ 20
This means that the sum of the number of pennies and nickels Kehlani has must be greater than or equal to 20 for the situation to be true.