Question

please check my answer > thanks :)

Answer 1

A student scored 78 and 92 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 85, inclusive. (1 point)




78<=x<=92

75<=x<=85

70<=x<=85 *******************

80<=x<=85

Answer 2

@iambatman @iGreen @Abhisar @M_A @Jhannybean

Answer 3

Mhm, so how did you get that?

Answer 4

\[80 \le \text{avg} \le 85\] find the average

Answer 5

you have 3 quizzes, how do you find average normally?

Answer 6

80 and 85

Answer 7

Are you really getting Iphone 6 plus......

Answer 8

just listent to iambatman
u need avarage
avg is between 80&85

Answer 9

yes in jan . cause my contacts ends :)

Answer 10

Ok, so once again, how do you find the average.

hint: This is where the x comes from.

Answer 11

Maybe he doesn't know how to.. @iambatman

Answer 12

u sure its D?

Answer 13

I never said it was D, you're not listening to me.

Answer 14

i am listening . i guess when u ask me how i get that . i mean I'm not to sure how to answer that. i wrote it out and yea lol

Answer 15

he has 3queezzes
the AVG of those between 80&85 OK?
do u understand why?

Answer 16

We know it's between \[80 \le \text{average} \le 85\] as it says in your problem, so we need to find the `average` which is \[\frac{ 78+92+x }{ 3 }\] now plug that into the compound inequality and solve for x.

Answer 17

exactly

Answer 18

70<=x<=85

Answer 19

Yes, so your guess what right.

Answer 20

I'm right I'm right I'm right I'm right !

Answer 21

@iambatman

Answer 22

@M_A IM RIGHT

Answer 23

yes
U are just uncertain about your answer
u shouldnt doubt

Answer 24

well thanks i thought/knew iwas right i just want to know for sure

Answer 25

Yes, it's right, and I hope you understood the process.

Answer 26

u have the rightt answer
confide your answer

Answer 27

trust your answer