Register
Marianna average 84 on her first three history exams. The first score was 67 the second score was seven less than the third score. What did she score on the second and third exams?
173k views
3 votes
Marianna average 84 on her first three history exams. The first score was 67 the second score was seven less than the third score. What did she score on the second and third exams?

User Mustak
by
8.5k points

1 Answer

5 votes
Let S=score on the second exam, then
(67+S+(S+7))/3=84
cross multiply
2S+74=252
2S=178
S=89
So second exam: 89
third exam=89+7=96
Check: (67+89+96)/3=84 ok.
User Rkagerer
by
8.9k points
← Prev Question Next Question →

Related questions

User Rcorre
asked Oct 28, 2024 140k views
How would you obtain NOTAM information for Marianna Muni on a flight departing from Cairns AAF?
Rcorre asked Oct 28, 2024
by Rcorre
8.1k points
1 answer
2 votes
140k views
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.5m questions

12.2m answers

Other Questions

How do you can you solve this problem 37 + y = 87; y =
What is .725 as a fraction
How do you estimate of 4 5/8 X 1/3
A bathtub is being filled with water. After 3 minutes 4/5 of the tub is full. Assuming the rate is constant, how much longer will it take to fill the tub?
Write words to match the expression. 24- ( 6+3)
Link Copied!