use the given mean to find the missing number in each data set......12,___,17: mean: 14?

Answer 1

.....12,___,17: mean: 14?

12,x,17 for average of 14?

(12+x+17)/3 = 14

why I add, and divide by 3?

sum/number of elements will get you the mean of the element.

so
(12+x+17)/3 = 14

12+17+x =42

29 + x = 42

x = 42- 29

x = 13

Plug back and check,

12 + 13 + 17 = 25 + 17 = 42

42/3 = 14

Now ckeck!

Answer: x = 13 will get you the average for the data set of 14

*still confused? write back

Answer 2

Well we know the mean for three pieces of data is:

[Number 1 + Number 2 + Number 3] / 3.

Right?

So what we have, then, is:

[12 + 17 + x] / 3.

But, we know that our mean is EQUAL to 14. So now we have the equation:

[12 + 17 + x] / 3 = 14

We can multiply by 3 on both sides and get:

12 + 17 + x = 42
29 + x = 42
x = 42 - 29
x = 13

Does that help?

Answer 3

12+x+17 = 3 * 14
x + 29 = 42
x = 13

Answer 4

Let the missing number be x

Then we have

(12+x+17)/3 = 14

Solving for x yields

12+17+x = 14(3)

29 + x = 42

x = 13

Answer 5

let missing number is n then
(12+n+17) / 3 = 14
12 + n +17 = 14 (3)
12 - 12+n+17 - 17 = 42 - 12 - 17
0 + n + 0 = 13
n = 13

Answer 6

if mean = 14,
(12 + x + 17)/3 = 14
29 + x = 42
x = 13

Answer 7

mean = average of the 3 numbers
so, let you __ be x

so 12+x+17=14 times 3
so x+29 = 42
so x = 42-29
=13

Answer 8

1

Answer 9

Yeah you kinda got the concept, staring / making eye contact with a girl doesn't mean the guy likes her. In MY perspective, it can mean three things: 1. The guy is comfortable talking to the girl, and is comfortable with her presence around (just friends). I plenty of friends that are girls and I always make eye contact when I talk to them, it's just casual u kno? 2. The guy wants to meet the girl / is interested in her (acquaintance). Either that, or... the girl is weird-looking or ugly lol. But still, guys wouldn't stare at a girl that long if she's like that. 3. The guy likes the girl. He doesn't know how to express his feelings, but wishes he could find a way to do so. I would tell you straight up how to tell which one of these views does a guy mean when he makes eye contact or stares, but I don't think I can. You should just.. kinda sense it. Good luck, you'll be more familiar with it along the way haha. Hope this helped ;)

Answer 10

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He likes you. A guy doesn't stare at a girl so much if he didn't have feelings for her or find her attractive. Guys don't have lots of facial muscles, so when he is staring at you he is not concentrating on his facial features rather than a female who would show more expressions. Also, when a guy stares you up and down, in other words checking you out is kind of his way of saying "I'm considering you a sexual partner" (don't ask). He may of gotten caught staring at you, so therefore he looked away quickly because he was embarrassed. But if it is a recurring thing, then he may like you.