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Mathematics 19 Online
OpenStudy (anonymous):

Help!

OpenStudy (anonymous):

@satellite73

OpenStudy (anonymous):

the most famous of all right triangles is the 3- 4 - 5 right triangle if you double all the sides you still have a right triangle, the measure will be \[6:8:10\]

OpenStudy (anonymous):

so A?

OpenStudy (anonymous):

@jim_thompson5910

jimthompson5910 (jim_thompson5910):

correct

OpenStudy (anonymous):

OpenStudy (anonymous):

@jim_thompson5910

OpenStudy (anonymous):

the length of the diagonal of a square is the length of the side times the square root of two

OpenStudy (anonymous):

so find the SR of 2 and x by 3

OpenStudy (anonymous):

no, just select \(3\sqrt2\)

OpenStudy (anonymous):

oh..easy enough.

OpenStudy (anonymous):

yes easy especially since you were given choices

OpenStudy (anonymous):

What about dis 1?

OpenStudy (anonymous):

you go to connexus?

OpenStudy (anonymous):

29 4/5?

OpenStudy (anonymous):

AAAAAAA!!!!!!

jimthompson5910 (jim_thompson5910):

4/5 = 0.8 21/25 = 0.84

OpenStudy (anonymous):

looks like a calculator exercise to me http://www.wolframalpha.com/input/?i=9*sqrt%2811%29

OpenStudy (anonymous):

yeah do with your choice

OpenStudy (anonymous):

ok, what about this one?

OpenStudy (anonymous):

another three four five right triangle, only this one i s nine, twelve, ___

OpenStudy (anonymous):

15

OpenStudy (anonymous):

bingo

OpenStudy (anonymous):

Almost done.

OpenStudy (anonymous):

i ended up with 23.8=23 4/5. but thats not an option

OpenStudy (anonymous):

@satellite73

jimthompson5910 (jim_thompson5910):

9*sqrt(7) = 23.81176 approximately use a calculator to see which option is closest to 23.81176

OpenStudy (anonymous):

ok...I got 23 4/5 is that correct?

jimthompson5910 (jim_thompson5910):

it's not in your list of choices

OpenStudy (anonymous):

i know, what is the fraction version?

jimthompson5910 (jim_thompson5910):

subtract each and apply the absolute value to make the result positive | 23.8117617 - (23+19/20) | = 0.1382383 | 23.8117617 - (23+17/20) | = 0.0382383 | 23.8117617 - (23+3/4) | = 0.0617617 | 23.8117617 - 63 | = 39.1882383 which result is the smallest?

OpenStudy (anonymous):

i have to say this is a rather bizarre question 'you are given an answer in radical form and then asked to write it as a mixed number? who writes this nonsense?

OpenStudy (anonymous):

????

OpenStudy (anonymous):

school these days :/

OpenStudy (anonymous):

What do we do know?

jimthompson5910 (jim_thompson5910):

@horsegirl325 do you see how I did those subtractions? the goal is to get as close to 0 as possible so we can get the best approximation

OpenStudy (anonymous):

ok....what do you want me to solve?

OpenStudy (anonymous):

@jim_thompson5910 what next????

OpenStudy (anonymous):

@misty1212 what about u?

jimthompson5910 (jim_thompson5910):

which of the following is the smallest 0.1382383 0.0382383 0.0617617 39.1882383

OpenStudy (surana):

I think it's the second one.

OpenStudy (anonymous):

2nd

OpenStudy (anonymous):

@jim_thompson5910

jimthompson5910 (jim_thompson5910):

yes 0.0382383 is the smallest of the four, so that confirms 23+17/20 is the closest

OpenStudy (anonymous):

Ya!

OpenStudy (anonymous):

I need help with only a couple more.

OpenStudy (surana):

Okay.

OpenStudy (anonymous):

@jim_thompson5910

OpenStudy (surana):

I think it might be 17, given the spaces between it, but that's just my personal guess from counting from one point to the next.

jimthompson5910 (jim_thompson5910):

see attached

OpenStudy (anonymous):

17!

OpenStudy (anonymous):

is it @jim_thompson5910 ?

jimthompson5910 (jim_thompson5910):

yes 17

OpenStudy (surana):

:D

OpenStudy (anonymous):

can u set this one up?

OpenStudy (anonymous):

@jim_thompson5910

OpenStudy (surana):

I think it might be ten or eleven, thoughts?

OpenStudy (anonymous):

8^2+8^2=z^2

jimthompson5910 (jim_thompson5910):

you have the correct equation so far, @horsegirl325

OpenStudy (anonymous):

i got 11.3

jimthompson5910 (jim_thompson5910):

same here

OpenStudy (anonymous):

thats not right tho, it has to be approximate

jimthompson5910 (jim_thompson5910):

well you just round at that point

OpenStudy (anonymous):

so 11?

jimthompson5910 (jim_thompson5910):

yes

OpenStudy (surana):

That's what I thought, but I also thought it might be ten. So that's why I didn't have a definitive answer.

OpenStudy (anonymous):

OpenStudy (anonymous):

2 41/50?

jimthompson5910 (jim_thompson5910):

oh wait, I messed up

jimthompson5910 (jim_thompson5910):

the vertical distance is not 8

jimthompson5910 (jim_thompson5910):

y = 1 to y = 7 is a change of 6, not 8

OpenStudy (anonymous):

i knew it!!

jimthompson5910 (jim_thompson5910):

so you need to solve 8^2 + 6^2 = z^2

OpenStudy (anonymous):

so 10!!

jimthompson5910 (jim_thompson5910):

correct

OpenStudy (anonymous):

what about this one?

OpenStudy (anonymous):

OpenStudy (surana):

I think it might be C. I calculated it and got 2.82843.

jimthompson5910 (jim_thompson5910):

you got 2 & 41/50? that's the closest number to 2*sqrt(2) = 2.8284

OpenStudy (surana):

Yeah, that's what I got.

OpenStudy (anonymous):

yep.

jimthompson5910 (jim_thompson5910):

2 & 41/50 is correct

OpenStudy (anonymous):

the last one!!

OpenStudy (anonymous):

A? @jim_thompson5910

OpenStudy (surana):

Possibly. They don't list the values of the triangles so it's hard to know.

OpenStudy (surana):

Where is everyone?

OpenStudy (anonymous):

????

jimthompson5910 (jim_thompson5910):

you have to check to see if a^2 + b^2 = c^2 is true for each set of numbers

jimthompson5910 (jim_thompson5910):

for instance, if we try out choice B a^2 + b^2 = c^2 50^2 + 40^2 = 60^2 2500 + 1600 = 3600 4100 = 3600 ... false since the last equation is false, that means choice B does NOT form a right triangle

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