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Kitty [74]
3 years ago
9

To pass a course with an Upper A ​grade, a student must have an average of 90 or greater. A​ student's grades on three tests are

91​, 94​, and 89. Find what score the student must get on the next test to get an Upper A average.
Mathematics
1 answer:
kipiarov [429]3 years ago
3 0

Answer:

The student must get at least 86 in the next text in order to get an upper A average.

Step-by-step explanation:

The scores in the three tests are: 91, 94 and 89

The average score here is \frac{91 + 94 + 89}{3} = 91 (rounded off to nearest whole number)

In order to get an Upper A average after tackling the next test, the students total score in the four tests must be 90 × 4 = 360

Let's say the student scores x in the fourth test.

Then; 91 + 94 + 89 + x ≥ 360

274 + x  ≥ 360

x ≥ 360 - 274

x ≥ 86

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