Step-by-step explanation:
We can set up an average equation in the form, where x is the last score in the fourth quarter:


She needs at least a 95 on the last quarter to average 90 in all four quarters.
This is the graph that the equation shows:
Two congruent parts mean the two parts you have are the same or they are equal to eachother.
Solve:-
72 tens - 12 tens
72 tens - 12 tens = 72 - 12 = 60
72 tens - 12 tens = 60 tens