3. Your Quiz Grades Are 85, 82, 75 And 90. What Must You Score On The…

3. Your quiz grades are 85, 82, 75 and 90. What must you score on the 5th exam to maintain an average grade of 85?

4.Your grades in Math subject are 87, 88 and 90. What grade do you need on the 4th quarter to get a final grade of 90?

please with solution ​

Step-by-step explanation:

3. To maintain an average grade of 85, the sum of your grades for the first four exams must be (85 x 4) = 340.

The sum of your current grades is (85 + 82 + 75 + 90) = 332.

To find out what you need on the 5th exam, you can subtract the sum of your current grades from the total required (340 – 332) = 8.

Therefore, you must score at least 8 points on the 5th exam to maintain an average grade of 85.

4. To get a final grade of 90 in Math, the sum of your grades for all four quarters must be (90 x 4) = 360.

The sum of your current grades is (87 + 88 + 90) = 265.

To find out what grade you need on the 4th quarter, you can subtract the sum of your current grades from the total required (360 – 265) = 95.

Therefore, you need to get a grade of at least 95 in the 4th quarter to get a final grade of 90.