A teacher figures out her students’ final grade in the class by finding the mean of the following three
2 answers:
Answer:
95%
Step-by-step explanation:
To find the average, we add up all the scores and divide by 3.
We know 2 of the scores, but one is unknown, we will call it x.
Jenny wants the average to be 85, so we can set the expression equal to 85
=85
Multiply by 3 on both sides
160+x=255
Subtract 160 from both sides
x=95
She will have to score a 95 to pass the class with an 85 average
Hope this helps!
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