Carla has three test scores of 85, 90, and 87. There is one more test during the semester. She wants

Carla has three test scores of 85, 90, and 87. There is one more test during the semester. She wants to make an A in the class, which means she needs her average to be a 90. What grade does she need to make on the fourth test to make an A in the class?


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