All Answers 358524 Answers

+118725

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Hi Ant Nix125,

Maybe your teacher found an easier method.
But yes, it may have been set in error.
it was pretty difficult.

(ofcourse my answer may be wrong but barring stupid errors I think it is sound.)

I am glad you sent it my way. If there is more feed back from your teacher I would like you to continue the post.

MelodyNov 4, 2013

0

It had me stumped too! Interesting answer although.

You may of just confirmed my suspicions that our teacher may of made an error with this question, it isn't something we've quite come across, not at this difficulty anyway.

GuestNov 4, 2013

+6

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thanks for the nice sharing and good information i like that have a nice day.....

miles47Nov 4, 2013

+118725

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8+1/6+3/4
first add 1/6 and 3/4 and then add 8 afterwards

To add 1/6 and 3/4 you need to get a common denominator, which will be 12
so change 1/6 to something over 12
and
change 3/4 to something over 12

add the somethings and put it over 12 (add the 8 afterwards)

OR

just do it on the calculator.

MelodyNov 4, 2013

+118725

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3x-7=3x+1 solve for x please???

Take 3x from both sides and you get -7 = +1 is this possible?

If it is not possible then there are no solutions.

MelodyNov 4, 2013

+118725

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This only has one zero and it is not a pretty one. I found it by graphing it in desmos graphing calculator.
Are you sure this is the correct question?
You may also consider changing your user name. It may make some people less inclined to help you.

MelodyNov 4, 2013

+118725

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2x^2+3x=275

This is a quadratic equation
"Quadratic equations are called quadratic because quadratus is Latin for "square"; in the leading term the variable is squared. "

there are a few different ways of solving quadratic equations. I will show you one of them.
First take all the terms to one side
2x^2 + 3x - 275 = 0

The leading coefficient of 2 (instead of 1) makes it a little harder.

You need to find 2 numbers that multiply to 2*-275 = -550
and add to +3

Since they multiply to a negative number, one has to be negative and the other one positive.
since they add to a positive number, the bigger one will be the positive one.
Since they add to a little number and multiply to a big number, the numbers must be close together in value
Think mainly about the -550 first
10*55 = 550 but they don't add (or subtract ) ot 3
11*50 = 550 still don't add to 3
25*22 = 550 AND 25+-22=+3
so the numbers I am looking for are 25 and -22
I am going to replace the 3x in the middle with -22x+25x
So
2x^2 + 3x - 275 = 0 becomes
2x^2 + -22x + 25x - 275 = 0

now factorise the first 2 and then factorise the second 2 separately
that is
2x(x - 11) + 25(x-11)=0 If you have done it properly, the 2 brackets will be the same.

2x groups of (x-11) + 25 groups of (x-11) => (2x+25) groups of (x-11) => (2x+25) (x-11) =0

(2x+25)*(x-11) =0
now if 2 things multiply together to give 0 then one of them (or both) have to be 0 so
either 2x+25=0 -> 2x=-25 -> x = -12.5
or
x-11=0 -> x=11
So there are 2 answers one is -12.5 and the other is 11.

I don't know how much maths you know - I have tried to break this up into little pieces.
Try to understand it and if you would like me to explain some more, let me know.
This is failrly difficult for this type of question.

MelodyNov 4, 2013

0

If you want to use it in a formula you should use this equation:
[5-(0.02*5)+0,25]

You can thank me later,
Mizter Math.

GuestNov 4, 2013

+22

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You have to first find the acceleration from the initial velocity, time and distance and then use the equation for acceleration to find the final velocity. So you just have to remember two things:

A)d=vt+(1/2)at², where d is the total distance traveled, t is the time taken to travel said distance and v is the initial velocity.

B)a=(vf-vi)/t, where again t is total time, a is acceleration and vf and vi are final velocity and initial velocity respectively.

You already have the values of d, t and vi so you all have to do is plug those values into the first formula, solve for a then set the second formula equal to that value of a that you solved for in the first equation. Plug in the values of vi and t that you already have into the formula and then solve for final velocity. If you need help with the calculations let me know and I'll see if I can help.

CyphersumNov 4, 2013

+22

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Well the speed of light is roughly 3*10^8 meters per second. Which means that after every second passes light will have traveled about 3*10^8 meters(which is 3 with eight zero's behind it or 300 000 000). Ringing any bells yet? If you still need some help let me know and I will try to explain further. By the way just in case you need the answer real quick it travels 1.05*10^9 meters(or one billion fifity million meters). Now try and find out how I got that number. After all you shouldn't trust strangers on the internet

CyphersumNov 4, 2013

+118725

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That sounds reasonable Bliu1, thanks.

I still don't know what Jamie was asking but since I am in a speculative mood, that is what I will do.

Okay so what Jamie may have wanted to know is:-

If John starts in town A and walks 22 km east then 39km north to get to town B
Then the true direction of town B from town A is approx 29degrees north of east.

This is not how compass directions are usually given.

Normally you'd say Town B is N61degreesE of Town A (since 90-29 = 61)

Or
the bearing of B from A is 061degrees.

MelodyNov 4, 2013

0

Ignore my previous answer.

arctan(22/39) = 29.42745640319

GuestNov 4, 2013

0

It's the "2nd" button on the top left.

GuestNov 4, 2013

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I think tan -1() is supposed to mean arctan?

tan -1(22/39) = 0.009845765191

GuestNov 4, 2013

0

GuestNov 4, 2013

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well, yeah, but my teacher never TEACHES you anything and gives you homework HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

GuestNov 4, 2013

+118725

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You write an essay, get a low grade and no one can tell you exactly what you did wrong. There is no 'right' answer. How do you learn from that?
You do a maths problem, get it wrong and your teacher can show you exactly what you should have done and from that you can learn and get it right next time.

Maths might be complicated sometimes but at least there is a 'right' answer and that makes it easier than language subjects! (for me anyway)

Not to mention the fact that

MATHS IS FUN!

*

MelodyNov 4, 2013

Nov 3, 2013

+118725

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Thanks kitty,
I didn't know that.

MelodyNov 3, 2013

+118725

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Do you mean that pi is your favourite number?

MelodyNov 3, 2013

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It is said generally that the Pythagorean Theorem was invented by a Greek named Pythagoras. Obviously it was named after him and is said to have been discovered or invented by the year 530 BC. However, researchers have found proof that even though documents do date and trace back to him but the theory itself might have existed a lot earlier than we might have believed.

GuestNov 3, 2013

0

GuestNov 3, 2013

+118725

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l2-xl>4

I think that these are easier to understand if you draw a rough number line.
0 is in the midle of your number line and you will need to mark 4 and -4 on it.
Now absolut value meant the distance from 0 on the number line.
So, the distance from 0 on the number line is more than 4.
Colour the bits on the number line that are more than 4 units away from 0.

Hopefully you have marked
2 - x < -4 and 2 - x > 4

Now, can you solve these 2 equations, get 2 answers?
It might then be finished or you might have to think a little more.

MelodyNov 3, 2013

+118725

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0=tan-1(ytot/xtot)=tan -1(22km/39km)

Sorry Jamie,
Your question does not make sense.

tan of what?
What is ytot and xtot?

MelodyNov 3, 2013

+118725

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Start by multiplying both sides by 3
Then expand the brackes and collect like terms for each side seperately.

Does that at least get you started?

MelodyNov 3, 2013

+118725

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If O is 4, F is 3, and X is 1900, what does the FOX say?

What a cute question.

3*4*1900 = 22800

The fox says 22800 (at least thats what crazy mathematicians think.)

MelodyNov 3, 2013

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