Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
TestTakingLifesaver
Group Title
A student scored 83 and 91 on her first two quizzes. Write and solve a compound inequality to find the possible values for a third quiz score that would give her an average between 85 and 90, inclusive
 one year ago
 one year ago
TestTakingLifesaver Group Title
A student scored 83 and 91 on her first two quizzes. Write and solve a compound inequality to find the possible values for a third quiz score that would give her an average between 85 and 90, inclusive
 one year ago
 one year ago

This Question is Closed

Australopithecus Group TitleBest ResponseYou've already chosen the best response.1
83 and 91 are the limits inclusively We can just take the average of the 3 tests, since we dont know the value of the third test it is our x value, then just place that between the limits and solve for x 85 <= (x + 83 + 91)/3 <=90 So first solve this, (x + 83 + 91)/3 <=90 then solve this, 85 <= (x + 83 + 91)/3 Then simply place the values you get into square brackets
 one year ago

TestTakingLifesaver Group TitleBest ResponseYou've already chosen the best response.0
@Australopithecus Best Responce, thanks
 one year ago

TestTakingLifesaver Group TitleBest ResponseYou've already chosen the best response.0
Could you simplify please?
 one year ago

Australopithecus Group TitleBest ResponseYou've already chosen the best response.1
treat it like an equality and solve for x, just remember if you multiply or divide by a negative you have to flip the inequality sign
 one year ago

Australopithecus Group TitleBest ResponseYou've already chosen the best response.1
other than that it is just simple algebra, make an attempt at it if you get stuck I will help you
 one year ago

Australopithecus Group TitleBest ResponseYou've already chosen the best response.1
You can use wolframalpha to check your solution as well
 one year ago
See more questions >>>
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...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 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.