Question

I am feeling stupid right now.....can somebody check this for me :)

Answer 1

The sum of 2 consecutive integers is less then 83.Find the pair of integers with the greatest sum.

This is what I did...
x + x + 1 < 83
2x < 82
x < 41

so would my integers be 39 and 40 ?

Answer 2

if its less than 41, it would be any number that is 40 or under 40, wont it?

Answer 3

the two numbers closest to 41 are 39 and 40.....so wouldn't that be the answer

Answer 4

because one number is x and the other is x + 1

Answer 5

so do you think 39 and 40 are the answers ?

Answer 6

@zepdrix .....check this please

Answer 7

they would have to be wouldn't they ?

Answer 8

although 40 and 41 = 81......

Answer 9

that would equal 79, and if the two numbers have to be under 41, and have a sum of less than 83, then yes. but

Answer 10

do I even need the inequality ? Or just add 2 numbers, and as long as they are consecutive and less then 83

Answer 11

ya i think you just add 2 numbers that are consecutive and under 83

Answer 12

so 41 and 42

Answer 13

i did that, but that equals 83, its not under 83..

Answer 14

no wait...it is less then 83.....40 and 41

Answer 15

so ya :)

Answer 16

40 and 41

Answer 17

I was told to set up an inequality, but when I did that, I got x < 41....so I got confused

Answer 18

http://answers.yahoo.com/question/index?qid=20120822062248AAARlQE
it is asked here, but not solved. it is like number 5 however.. are those also problems you have? maybe this will help :)

Answer 19

did that help?

Answer 20

yes it did...thank you so much :)

Answer 21

I wish they would have had the answer to the one I am doing now

Answer 22

good! :) do you think you can help me with a problem please? have have been trying to solve it for hours. Literally!

Answer 23

I can try...is it posted ?

Answer 24

ya

Answer 25

(35 + 37 + 42 + 57 + 61 + 70) / 6 = 302/6 = 50.33
35 - 50.33 = -15.33^2
37 - 50.33 = - 13.33^2
42 - 50.33 = -8.33^2
57 - 50.33 = 6.67^2
61 - 50.33 = 10.67^2
70 - 50.33 = 19.67^2

now add the squares...
(3.92 + 3.65 + 2.89 + 2.58 + 3.27 + 4.44) / 6 = 20.75/6 = 3.45

I did something wrong....I am way off

Answer 26

ive been trying to figure out your problem. i found another problem like it but different numbers. http://answers.yahoo.com/question/index?qid=20110110221921AA77LEC
so it would be
2x+1<83
2x<83-1
2x<82
x<41
the largest integer that is less than 41, is 40. and the next consecutive integer is 41.
so it would be
40+41<83
which would come out to 81<83

Answer 27

but I thought it had to be less then 41

Answer 28

look at what they did

Answer 29

thanks! i did all that, but didnt divide by 6. why do you divide by 6 twice?

Answer 30

check this out......
http://easycalculation.com/statistics/standard-deviation.php

Answer 31

your answer is 14.3

Answer 32

omg thank you!

Answer 33

at first I was going by this...
http://www.mathsisfun.com/data/standard-deviation.html

Answer 34

wouldnt it be variance tho, not standard variation?

Answer 35

or is it the same?

Answer 36

ya, i saw that.. thats what i was trying too.

Answer 37

I am not sure...look at the calculator link....there are many things listed....I really don't know

Answer 38

did you get anywhere close to 14.3 ?

Answer 39

mine was way off

Answer 40

same! i got 1.74....

Answer 41

well..I got 3.45.....I had to do a lot of rounding....either way I was way off

Answer 42

got it!! finally! i used that calculator and variance is standarvariation^2 so i just plugged in the standard variation and its 205.4... which is what it says

Answer 43

I know you have to find the mean by adding all the numbers and dividing by how many numbers there are. Then you subtract that answer from every number and square it. Then you add the squared numbers and divide by how many numbers there are. I always hated these kind of problems

Answer 44

oh my......check this calculator out...I o not think 14.3 is the answer
http://www.miniwebtool.com/sample-variance-calculator/

Answer 45

typo * do

Answer 46

thanks!

Answer 47

ive been getting them wrong, i think im gunna fail this part :/

Answer 48

I am sorry I can't help more....I am not so good at them either, as you can tell

Answer 49

noo! its not your fault! dont worry! you were great help earlier (and even now) thank you! your really smart :)