An average score of 90 or above in an English course receives an A grade. A student has grades of 81, 87, 94, 93 on four tests. Find the range of scores on the fifth test that will give the student an A grade. (Let the maximum score on each test be 100. Enter your answer using interval notation.)

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Mathematics

4 December, 11:34

An average score of 90 or above in an English course receives an A grade. A student has grades of 81, 87, 94, 93 on four tests. Find the range of scores on the fifth test that will give the student an A grade. (Let the maximum score on each test be 100. Enter your answer using interval notation.)

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Steve Ponce · Answer 1

95>=X <=100. More or equal to 95 or equal or less than 100.

Step-by-step explanation:

The Total of the first score is needed first

81+87 + 94+93=355

The total of this score

Let X be the 5TH score we are looking for

(355 + X) / 5 = 90

355+X = 450

X = 450-355

X = 95 the person needs to sore between 95 and 100 (which is the highest possible score).