Krista and Alexa played balloon darts at a school fair. Krista popped 5 balloons and Alexa popped n balloons. Together, they popped a total of 13 balloons. Which equation can be used to determine the number of balloons Alexa popped? How many balloons did she pop?
The equation that can be used to determine the number of balloons Alexa popped is: Krista's popped balloons + Alexa's popped balloons = total popped balloons.
In this case, the equation is: 5 + n = 13.
Simplifying the equation, we get: n = 13 - 5 = 8.
Therefore, Alexa popped 8 balloons.