A community for students.
Here's the question you clicked on:
 0 viewing
Bri_Durbin
 3 years ago
Please help with a couple of questions!
Bri_Durbin
 3 years ago
Please help with a couple of questions!

This Question is Closed

Bri_Durbin
 3 years ago
Best ResponseYou've already chosen the best response.0A student scored 78 and 95 on his first two quizzes. Use a compound inequality to find the possible values for a third quiz score that would give him an average between 80 and 90, inclusive. (1 point) 67 ≤ x ≤ 97 78 ≤ x ≤ 95 80 ≤ x ≤ 90 86 ≤ x ≤ 87

amorfide
 3 years ago
Best ResponseYou've already chosen the best response.3now it would not first of all you are given that he gets an average between 80 and 90 so you know it is between these two values you dont know his exact average so it could be 80 or higher but it must be 90 or belowe so it can be equal to 80 or above and it can be equal to 90 or below this gives two inequalities 80 ≤ x and x ≤ 90 this can be written as 1 inequality 80 ≤ x ≤ 90 ≤ this means less than or equal to the one that points the opposite way would be greater than or equal to think of it as a number line pointing right is positive meaning the numbers get bigger, getting greater pointing left is getting smaller so it gets less and less remember it is called greater than or equal to or less than or equal to because of the line underneath the sign

Bri_Durbin
 3 years ago
Best ResponseYou've already chosen the best response.0can you help with another one???

Bri_Durbin
 3 years ago
Best ResponseYou've already chosen the best response.0Solve. x – 1 over 5 = 3 x = –14/5 and x = 16/5 x = 14/5 and x = –16/5 x = –14/5 and x = –16/5 x = 14/5 and x = 16/5

Bri_Durbin
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1354657718293:dw

Bri_Durbin
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1354657798629:dw

amorfide
 3 years ago
Best ResponseYou've already chosen the best response.3okay absolute values okay so you should sketch a graph sketch x(1/5)=3 if you do not know how first you must know x=x x=x so you know you always get a positive number from whatever is in the   so from this you know the graph will show only positive values so first you will draw the graph of y=x(1/5) then you will reflect the negative part of the graph for example if i have x2=4 i will draw the graphs for y=x2 y=4 and y=x2 this would give dw:1354657998510:dw now i must draw y=x2 well since it is reflected i will have all of the negative part of the graph y=x2 on the positive side of the graph so it will be like...

amorfide
 3 years ago
Best ResponseYou've already chosen the best response.3I labelled it (x2) because the graph y=x2 is essentially y=x2 and the other part is that multiplied by 1 which gives y=(x2) now that we have drawn a graph you know it crosses with each other 2 times so you will make them equal to each other for example y=x2 crosses y=4 so make them equal to each other x2=4 re arrange to get x x=6 now i know that (x2) crosses with 4 so i make them equal (x2)=4 i re arrange to get x x=2 sorry i made a mistake in the graph drawing it should be y=4 not y=3 okay now follow the same thing with your question
Ask your own question
Sign UpFind more explanations on OpenStudy
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.