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+118735

aaliyahlala:
:? if you do 8X2 indices 2 X3indices 2how do you 27

I am sorry but I don't understand your question.

I'll try to give you some pointers so that you may be able to re-write the question in a more understandabe way.

firstly, I don't know if your X is a pronumeral or a multiply sign. (This can often be a tricky one. If it is a
pronumeral, maybe you could use a different letter like y perhaps)

3 to the power of 2 is written 3^2 OR 3²
To get 3 ² I wrote 32 then I high lighted the 2 and pressed the 'sup' button that is located above the smilies.

'sup' stands for supertext
'sub' stands for subtext

if you want 3x all to the power of 2 then use brackets (3x)^2 OR (3x)²

I hope that helps you to rewrite your question.

MelodyJan 18, 2014

Jan 17, 2014

How to factor what?

GuestJan 17, 2014

DJ-7809:
Alright so take some graph paper, or go here: https://www.desmos.com/calculator then draw a line so that it makes a perfect T with the line that you drew. Use your knowledge of how to write out the equation of a line and you can just plug in a few points on the line to name your equation of a line.

I think it would be more effective to do it the manual way, but thanks anyways.

GuestJan 17, 2014

Alright so take some graph paper, or go here: https://www.desmos.com/calculator then draw a line so that it makes a perfect T with the line that you drew. Use your knowledge of how to write out the equation of a line and you can just plug in a few points on the line to name your equation of a line.

GuestJan 17, 2014

-2.1

GuestJan 17, 2014

12 ya d**k

GuestJan 17, 2014

+118735

SHAE:
The height of a moving truck is 5 feet. The distance from the bottom edge of a ramp on the ground to the truck is 10 feet. How long is the ramp?

Maybe you mean,
The perpendicular height from the ground to the tray of a truck is 5 feet.
The horizontal distance from the end of the ramp to the end of the truck is 10 feet.
This would give you a right angled triangle where the ramp is the hypotenuse.
You would use Pythagoras' Theory to find the length of the ramp.

MelodyJan 17, 2014

+118735

Guest:
Playing with numbers?
Now that's just irresponsible!

"So, I guess I post the next one?
Hum...
5+6=218"

The mystery to the very answer of that riddle! :3

5+6=218

5+6= 3+2+ 2* 3
.......(3+2+2)* 3 .........=21
...........(2+2* 3)..........=....8
.................................=218

therefore 5+6=218 and 3 is the key to the universe

MelodyJan 17, 2014

+118735

That's excellent!

MelodyJan 17, 2014

Thanks! That was it, now I get it.
For some reason I had excluded the '1' in the equation.
0.5^0.05 = 0.9659363289248456
/ 20 = Wrong answer

1 -0.5^0.05 = 0.0340636710751544 = right answer

GuestJan 17, 2014

ez, ez
1+1 = 10

GuestJan 17, 2014

Playing with numbers?
Now that's just irresponsible!

The mystery to the very answer of that riddle! :3

GuestJan 17, 2014

+118735

Guest:
25+35=(5+7)*5=12*5 (which isn't really any easier than 25+35 which you can easily make 30+30, but hey...) = 60

I was promised cake, where is it?!

So, I guess I post the next one?
Hum...
5+6=218

----------------------------------------------------------
It wasn't meant to be easier, I just want people to play with numbers

What cake, what question, I'm all confused. 5+6=218 ? What mystery does this hold ?

MelodyJan 17, 2014

25+35=(5+7)*5=12*5 (which isn't really any easier than 25+35 which you can easily make 30+30, but hey...) = 60

I was promised cake, where is it?!

So, I guess I post the next one?

Hum...
5+6=218

GuestJan 17, 2014

#50

+118735

Can't anyone do this

MelodyJan 17, 2014

+118735

Melody:
I'd like one of the younger children to answer iwilli28's question

Explain how you can solve 40 x 16 by breaking apart the numbers.

How about 4 x 10 x16 = 4 x 16 x 10 = 64 x 10 = 640

-------------------------------------------------------------------------------------------------------------------

How do you make 25+35
with just the numbers 5, 5 and 7 ?
Hint: factorise out 5.

MelodyJan 17, 2014

#10

+118735

How can you tell if a large numberis exactly divisable by 9
*
Please explain and give a couple of examples.
(Don't actually do the division and you don't need a calculator.)

MelodyJan 17, 2014

+118735

+26

We appear to be finished for the day

Helpers today were Brooke, Nobody Special, Adam, sik, Adam, Greatlordlucina, Brad, Jazz, and one or more guests.
If I forgot someone please forgive me.
A big thank you to all helpers.

That is it I think.
Melody.

MelodyJan 17, 2014

+118735

nobody special:
How do I graph a step funtion on an online graphing calculator? I can't find the int button on desmos....

Hi Special,
It is lovely to see you one the forum again.

You do it like this, is that enough explanation?

140117 Desmos graph restrictions.JPG

MelodyJan 17, 2014

+118735

Nikki1300:
Solve by using substitution,and check your answers.
3x+y=5z
2x-y=10
I tried this a few times and I kept getting the wrong answer even though I was doing the work right,someone please help!

I don't think that you really intended the z to be there, did you? I'll ignore the z and say that it is just 5.
anyway to start i'd add them

3x+2x+y-y=5+10
5x=15
x=3

Sub x=3 into either of the original equations (I'll use the second one)
2x-y=10
2*3-y=10
6-y=10
6-10=y
y=-4

therefore x=3 and y=-4

double check by substituting both numbers into the 1st equ 3x+y=5
3*3+-4 = 9-4 = 5 great, it's correct

MelodyJan 17, 2014

+118735

Hannah2:
What is -5x+2<17 ?

I'm glad that you had a go Brooke , but you made a couple of mistakes

-5x + 2 <17

You treat inequalities just the same as equations,
except
1) If you swap sides you have to turn the sign around
eg if x>6 then 6<x

2) If you multiply or divide by a negative number you have to turn the sign around.
eg if -2x<10 then x>-5
or if x/(-2) > 6 then x<-12

3) if you turn both sides upside down.
eg, 3/x > 5/4 then x/3 < 4/5

And I think that covers it.

-5x + 2 < 17
now I'll take 2 off both sides - the sign stays the same.
-5x + 2 -2 < 17 - 2
-5x < 15
now I have to divide both sides by -5 and when you divide by a negative number the sign gets swapped
x > -3

MelodyJan 17, 2014

+118735

Tiff1:
Is the square root of 5 times the square root of 2 rational or irrational?

sqrt10
irrational.

MelodyJan 17, 2014

+118735

cows : D:
How far did the cow have to jump to get over the moon?

The average distance to the Moon is 384403 km (238857 miles).

MelodyJan 17, 2014

+118735

LovelyMe:
:? Find a solution to the following system of equations. Which ordered pair “works”?

a. (–8, –15) b. (–2, –15) c. (0, 1) d. (2, 5)
Please Please please help

I think that half your question is missing.

"the following system of equations."

you didn't include any equations!

MelodyJan 17, 2014

+118735

kingabba123:
:cry: how to find HCF

MelodyJan 17, 2014

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