All Answers

Okay, perhaps I crossed a line. I apologize for my behaviour (I'm not being sarcastic).

GuestFeb 14, 2014

+1313

thanks ROM and melody just saw or post ROM. good help. I wonder in asking to solve the second equation at post 4 that I can do [-b+-(Sqrt b ²(-4*a*c))/(2*a)]
which I didn't ask very well, since I had resolved it to a further point but via this manner. it's OK right?

StuFeb 14, 2014

+1313

side question ot, when removing Sqrt in transposing given t= sqrt2mg, solve for g. it is easiest to remove the Sqrt first I get that, but answer given is g = t ²/2m. I was about to give this answer, but isnt everything under the Sqrt squared to remove it, so.. when transposing /2m shouldn't they be squared. I get that it isn't so I would just like to know why as I'm sure it is a simple answe.r. thanks.

StuFeb 14, 2014

+37

Yeah...not even going to try that one. I have other things I must dwell on. Sorry I haven't been able to assist in answering anything today; Tuesdays and Thursdays are especially busy for me. I'll try to help tomorrow, but no promises! I'm a busy man....I do enjoy helping people out, though!

Grammar FascistFeb 14, 2014

+1313

in fact please calculate in steps the following,

-6 + Sqrt 6 ²-4*2*3 /2*3 include parenthesis please.
I got x1=-0.634

if m answer is right don't worry to solve. thanks

thanks melody, I see they will not always be nice simple numbers do I round of at 3 decimal placings as a rule?

StuFeb 14, 2014

+118725

Stu:
:D

OK, so I get the quadratic formula. it ain't such a tough nut rather it is more like a gentle baby. but to save upsetting it on this day of romance I'd like to resolve one thing about square rooting in maths/this formula.

assuming you are solving x²+3x+1=0

after half of the formula I have [-3 - Sqrt (+9-4)] / (2*1).. my question is simple and two part.

1) to Sqrt the 9 I must also Sqrt the 4 or calculate the sum of 9-4 then Sqrt before manipulating change from outside the Sqrt right?
You have to find 9-4 =5 and THEN take the square root.
2) please insert parenthesis to solve including signs.

MelodyFeb 14, 2014

+6252

Quote:
after half of the formula I have, -3 - Sqrt +9-4 /2*1.. my question is simple and two part.

1) to Sqrt the 9 I must also Sqrt the 4 or calculate the sum of 9-4 then Sqrt before manipulating change from outside the Sqrt right?

2) please insert parenthesis to solve including signs.

if this is the quadratic formula evaluated for a=1, b=3, and c=4

then notated properly it is

[size=200]([/size]-3 +/- sqrt[size=150]([/size]9 - 4[size=150])[/size][size=200])/[/size](2*1)

so to answer (1) you subtract the 4 from 9 to get 5 and then take the square root

(2) is answered by the formula above.

RomFeb 14, 2014

+72

Thanks alot Rom!

Princess Sophie EFeb 14, 2014

+118725

Guest:
what is 8.6 as a fraction?

86/10 or 8 and 6/10

MelodyFeb 14, 2014

+118725

Guest:
what is the gcf of 18 35

I think that you mean greatest common factor gcf

What are the factors of 18, (I'm starting with 18 because it is the smallest one)
1 and 18, 2 and 9, 3 and 6 and thats it
lets put them in order
1,2,3,6,9,18
does 18 go into 35-- no,
does 9 go into 35 --no
and just keep working down the list until you find one where you say YES
that will be the GCF

MelodyFeb 14, 2014

+118725

jp77:
:)what is 9/2 as a percent

Thanks dude, you are correct of course

You could just say

9/2 *100% = 450%

To turn a fraction or a decimal into a percentage you just have to multiply by 100 and put a % sign.

MelodyFeb 14, 2014

+118725

zethwolves:
Thank you

What nice manners zethwolves. Rom will appreciate that.
Why don't you join up and get all the benefits that the forum offers?

MelodyFeb 14, 2014

+118725

kodypepper:
what is -1.2 turned into a fraction

the further right the digit is the smaller the PLACE VALUE that it has.
2 has the smallest place value - it is in the tenths column

the -1 is a whole number
so I could just say that it is

-1 and 2/10 and this can be simplified to -1 and 1/5 That is a mixed numeral.

If you want an improper fraction then it is -12/10 which simplifies to -6/5

There you go

MelodyFeb 14, 2014

+118725

jyotig:
Thank you so much for your help. I'm in 5th grade. 10 Years Old. My mom found this website. You have been a great help. Give me few tips how can do well in math.
Thanks again

Hi Jyotig,
Why don't you sign up properly if you are going to spend time with us?
Melody.

MelodyFeb 14, 2014

+118725

noor:
what is the angle whose sin is 6/7
can you explain how do we use a calculator for that ?

inverse sin (6/7) = your angle

Inverse sine is the same as arc sine
the notation might be

sin ^-1(6/7)
or
asin(6/7)

To bring up inverse sin on a calc you usually have to press '2nd' or 'shift' and then press sin

Remember: Whenever you are looking for an angle you have to use inverse trigonometry.

MelodyFeb 14, 2014

+118725

Village_Chief:
The test scores were normally distributed with a mean of 43 and a standard deviation of 3.

(a) Approximately what percentage of the scores lies between 40 and 46?

(b) Approximately what percentage of the scores lies between 43 and 46?

Approx 68% of scores lie within one standard deviation of the mean.
Really, this is so easy you should not need more help.

140214 normal curve z scores.JPG

MelodyFeb 14, 2014

+118725