you are studying for your final exam of the semester. up to this point,you recieved 3 exam scores of 76%,99%, and 86%. to recieve a grade of A in the class you must average exam score between 90% and 100% for all 4 exams including the final.

Find the widest range of scores that you can get on the final exam in order to recieve a grade of A for the class.Use interval notation

Question

you are studying for your final exam of the semester. up to this point,you recieved 3 exam scores of 76%,99%, and 86%. to recieve a grade of A in the class you must average exam score between 90% and 100% for all 4 exams including the final.

Find the widest range of scores that you can get on the final exam in order to recieve a grade of A for the class.Use interval notation

anonymous · Answer

We know that the sum of the grades /4 has to be no smaller than 90 and no greater than 100

The sum of the 3 grades we know + x, the fourth exam divided by 4 is between 90 and 100

$$90\le{{76+99+86+x} \over {4} }\le100$$

Can you take it from there?

anonymous · Answer

no i need more help lol