Question

kayla receives grades of 94, 82, 96, and 78 on her last four algebra test to graduate with hones she needs at least a b in the cours is it possible for kayla to earn an a in the cousre if an a requires an average of 90 or more

Answer 1

yes

Explanation:

You want to know if Kayla can earn an average of 90, given that her first four test grades are 94, 82, 96, and 78.

Average

The average of Kayla's grades is found by adding them up and dividing by their number. If we let x represent the grade on her 5th test, then her average would be ...

average = (94 +82 +96 +78 +x)/5 = (350 +x)/5 = 70 +x/5

For this to have the value 90, we must have x ...

90 = 70 +x/5

20 = x/5

100 = x

It is mathematically possible for Kayla to earn an A for the course if she gets a perfect score (100) on her last test.