Answer:
94
Step-by-step explanation:
Given: Alexis recieved an 85,89,92on three tests
To Find: Number of points she needs to score in order to have an average of atleast 90.
Solution:
Let the marks scored by Alexis in next test = 
Marks scored by Alexis in three test = 


Sum of marks scored by Alexis = 
=
Average of Alexis's marks after next test = 
=
To have average of at least 90
≥90


Alexis needs to score atleast 94 to have an average of at least 90