A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing


  • 5 years ago

John had the average score of 84 on his first three Checkpoints. The first score was 67. The second score was 7 less than the third score. What are his scores in the second and third Checkpoints?

  • This Question is Closed
  1. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[ Let\ s_2\ and\ s_3\] be the scores on the second and third checkpoints respectively. The average score would be \[ Average = \frac{s_1+s_2 + s_3}{3}\] Since the score on the first checkpoint is 67, and the average is 84 we have: \[84 = \frac{67 + s_2 +s_3}{3} \] We are also given that the second score was 7 less than the third.. \[ \rightarrow s_2 = s_3-7\] We have 2 equations and 2 unknowns. Solve for s2 and s3.

  2. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...


  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.