Tao wants to make at least an 85 average on his five English exams. What grade can he score on the fifth test if the average of the first four tests was a 92

Minimum 57

Step-by-step explanation:

Average, or, Mean has the formula:

Average = Sum of all numbers/Number of numbers

If, Tao wants 85 as average in 5 exams, his sum of 5 exams needs to be:

Average = Sum of all numbers/Number of numbers

85 = Sum/5

Sum = 5 * 85 = 425

Since, the average of 4 tests is already 92, the sum of 4 tests is:

92 = Sum/4

Sum = 4 * 92 = 368

So, he needs atleast (425 - 368) = 57 on his first test to make total average for 5tests to be 85.

So, minimum 57 needs to be scored