anonymous
  • anonymous
what is 20% of 2/3 of 15? a) 1 b) 2 c) 3 d) 4 f) 5
Algebra
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
do you mean like 20% x 2/3 x 15?
anonymous
  • anonymous
I'm not very sure. This is exactly what I had on my paper. @Rose6
anonymous
  • anonymous
oh ok sorry i couldn't help much

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anonymous
  • anonymous
It's ok. Thanks though @Rose6
anonymous
  • anonymous
no prob. :)
anonymous
  • anonymous
first u gotta do is 2/3 times 15 to find what two third of 15 is
anonymous
  • anonymous
\[\frac{ 2 }{ 3 }\times15\]
anonymous
  • anonymous
dont answer the question look at the code plz
anonymous
  • anonymous
we have to tell them how to solve not telling them answers
anonymous
  • anonymous
Sorry, but what code? @jkim3592
anonymous
  • anonymous
Code of Conduct
anonymous
  • anonymous
Hello! You have to work backwards on this one. The first step is to find 2/3 of 15. Do you know how to do that?
anonymous
  • anonymous
not really...
anonymous
  • anonymous
ok. well 15 is equal to 15/1, you understand that, right?
anonymous
  • anonymous
yes I do.
anonymous
  • anonymous
good. to multiply fractions, you take the top two and multiply them, and do the same with the bottom two. so a/b times c/d is equal to ac/bd
anonymous
  • anonymous
now try to multiply 2/3 and 15/1.
anonymous
  • anonymous
ok.
anonymous
  • anonymous
did you get it?
anonymous
  • anonymous
would it be 30/3? or 90/3?
anonymous
  • anonymous
it would be 30/3
anonymous
  • anonymous
sorry if i wasn't clear on the "a/b times c/d" thing
anonymous
  • anonymous
Thats ok, no problem.
anonymous
  • anonymous
so what's 30/3?
anonymous
  • anonymous
so now, would the answer be 1?
anonymous
  • anonymous
be careful there. try again with 30 divided by 3
anonymous
  • anonymous
10 I mean.
anonymous
  • anonymous
10/20 = 2
anonymous
  • anonymous
10 is right! now for the 20% of 10. We need to convert the percent to a decimal before we use it to multiply. can you convert 20% to a decimal?
anonymous
  • anonymous
.20
anonymous
  • anonymous
right? or .02
anonymous
  • anonymous
you were right, .20
anonymous
  • anonymous
now multiply .20 by 10.
anonymous
  • anonymous
2! :D
anonymous
  • anonymous
yup.
anonymous
  • anonymous
Thank you very much!
anonymous
  • anonymous
no problem
anonymous
  • anonymous
anytime
anonymous
  • anonymous
would you min helping me on another problem please? If not, it's fine. :)
anonymous
  • anonymous
of course!
anonymous
  • anonymous
Great!
anonymous
  • anonymous
After two months on a diet, John's weight dropped from 168 pounds to 147 pounds. By what percent did John's weight drop?
anonymous
  • anonymous
ok. So what was john's original weight?
anonymous
  • anonymous
147. So what I have up to right now is 168/147.
anonymous
  • anonymous
I'm sorry. I meant to type 147/168.
anonymous
  • anonymous
well, there are a couple of ways to do this problem. The number you have right now (147/168) is the percent for how much he has right now
anonymous
  • anonymous
can you convert 147/168 to a percent?
anonymous
  • anonymous
1.14% ?
anonymous
  • anonymous
well, what's 147 divided by 168? give me the decimal value
anonymous
  • anonymous
My appologies, this is probably very easy but I'm not sure what decimal value is...or dont remember.
anonymous
  • anonymous
for example 1/2 is .5 in decimal
anonymous
  • anonymous
1/2 is a fraction, .5 is a decimal, and 50% is a percent
anonymous
  • anonymous
.27
anonymous
  • anonymous
not quite. what's 147 divided by 168?
anonymous
  • anonymous
.87 I don't know where I got .27 from.
anonymous
  • anonymous
it's actually .875. your calculator might be cutting it off or something
anonymous
  • anonymous
the whole thing showed but I didn't think I needed to type the 5. Ok, now I know.
anonymous
  • anonymous
sometimes you don't, but for this one you do :) ok. so we know .875 or 87.5% is how much John has left, so we need to take that number away from 100%. so what's 100%-87.5%?
anonymous
  • anonymous
It is 12.5
anonymous
  • anonymous
and that's how much he lost, which is the answer! I'm not sure if the way we solved this is the way your teacher wanted you to. do you want me to show you another way?
anonymous
  • anonymous
Sure. 12.5 would equal to 12 1/2 correct? This is one of the answers I have on my paper.
anonymous
  • anonymous
Actually, you don'need to. It's fine. :)
anonymous
  • anonymous
that's right!
anonymous
  • anonymous
Thank you very much! Would you mind helping me again please? You're a great help. :)
anonymous
  • anonymous
keep them coming! :P
anonymous
  • anonymous
happy to help
anonymous
  • anonymous
Great!
anonymous
  • anonymous
Which expression is equivalent to 0.01? (wait one moment please.)
anonymous
  • anonymous
|dw:1378171198967:dw| 2) 0.01/10 3) 1/100 4) 1/100/1/10 5) 1/10^4
anonymous
  • anonymous
ok.
anonymous
  • anonymous
so let's look at number one. Do you know how to simplify that?
anonymous
  • anonymous
Nope.
anonymous
  • anonymous
ok. So what does that symbol mean? the one that kind of looks like a check mark
anonymous
  • anonymous
I know this, but I forgot. My apologies..
anonymous
  • anonymous
That's ok. It is the square root symbol. Do you remember how it works?
anonymous
  • anonymous
Oh right. Sort of.
anonymous
  • anonymous
|dw:1378171733682:dw|
anonymous
  • anonymous
and the square root of ten?
anonymous
  • anonymous
1=1 10=3.162 ?
anonymous
  • anonymous
oops, my bad. i meant to type 100, not ten
anonymous
  • anonymous
what's the square root of one hundred?
anonymous
  • anonymous
um...10?
anonymous
  • anonymous
yup! Do you understand what i did in the drawing?
anonymous
  • anonymous
Sort of... :/
anonymous
  • anonymous
the square root of a fraction is the same thing as the square root of the top number divided by the square root of the bottom number. Anyways, the square root of 1 is 1, you're right! and the square root of 100 is 10, right! so what is 1/10 as a decimal?
anonymous
  • anonymous
0.1
anonymous
  • anonymous
and is that equal to 0.01?
anonymous
  • anonymous
No. Wait how would it be equal to 0.01?
anonymous
  • anonymous
right-it's not. so the answer isn't not number one. let's look at number two. what is 0.01 divided by 10?
anonymous
  • anonymous
It's 0.001so it wouldnt be number two right?
anonymous
  • anonymous
exactly. how about number 3?
anonymous
  • anonymous
0.0001 so no.
anonymous
  • anonymous
you might be looking at the wrong problem
anonymous
  • anonymous
number 3 is 1 divided by 100.
anonymous
  • anonymous
oh right. I did it wring. 1/100 is 0.01!
anonymous
  • anonymous
yup
anonymous
  • anonymous
i dont think we need to check number 4 and 5
anonymous
  • anonymous
:P
anonymous
  • anonymous
Sweet!
anonymous
  • anonymous
haha! Oh, I have a few more, would you mind? :)
anonymous
  • anonymous
Just two more...
anonymous
  • anonymous
of course not, go right ahead!
anonymous
  • anonymous
You are so rad! Thank you.
anonymous
  • anonymous
no problem
anonymous
  • anonymous
If 8 kilograms of alcohol are added to 17 kilograms of pure water, what percent by weight of the resulting solution is alcohol? a) 8% b) 17% c) 32% d) 68% e) 35%
anonymous
  • anonymous
ok. So we need to find the final amount of kilograms. How do we find how much is left at the end?
anonymous
  • anonymous
we have 17 kg of water and we add 8 more kg of alcohol. how much kg do we have left?
anonymous
  • anonymous
* how many kilograms do we have left
anonymous
  • anonymous
9 kg. I am really not sure. :/
anonymous
  • anonymous
so we have 17 kg of water, right?
anonymous
  • anonymous
yes.
anonymous
  • anonymous
we add 8 more kg of alcohol. How many kilograms of "stuff" do we have now?
anonymous
  • anonymous
25kg
anonymous
  • anonymous
right! and how much of that is alcohol?
anonymous
  • anonymous
8kg
anonymous
  • anonymous
exactly! so the amount of alcohol is 8 kg / 25 kg. what is 8/25 in percent form?
anonymous
  • anonymous
32%
anonymous
  • anonymous
yup. So the answer is...
anonymous
  • anonymous
C!
anonymous
  • anonymous
good job!
anonymous
  • anonymous
Thank you very much, you are great. I need to go...I will be back on later tonight. I don't know if you will be too, but if you are, then great. :) I really appreciate your help.
anonymous
  • anonymous
no problem.
anonymous
  • anonymous
bye!

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