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Solved my own question, and the hardest math question ever encountered.
When simplefying a number with an existing exponent you have to multiply the exponents you get togheter.
E.G
8^3=512 to 2^3=8 so 2^3*3=512 so you would get 2^9

GuestOct 9, 2013

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If the area is a cube than its dimensions would be 10, 10, and 10.

GuestOct 9, 2013

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if the triangle has sides a, b, and c, draw an altitude from c to a and lable the two parts of a divided by c a1 and a2. Lable the altitude h. Now try using the pythagorean theorem to find h, which will ultimately help you find the area of the triangle.

GuestOct 9, 2013

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my english isnt that good with maths. lets just say i have a land. its space is 1000idontknowwithwhatyoumeasurespace. i need to know length and width. : D

GuestOct 9, 2013

+118725

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1.5/100 * 5878.08

MelodyOct 9, 2013

+118725

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Your question doesn't really make sense.
do you mean a plot of land? That would be measured in square metres.
If the plot is rectanglar there is an infinite number of different answers.
Sorry, you will need to be more precise.

MelodyOct 9, 2013

+118725

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I would still like to know what nEZ+ stands for but this it the solution.

Maths induction 131009.jpg

MelodyOct 9, 2013

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GuestOct 9, 2013

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So i did fail at "squaring", thank you for pointing me out.

GuestOct 9, 2013

+118725

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I am not sure that I understand the question.
Do you mean

a ₁=1
a _n+1 = 4 + 2(a _n) ^1/3

so the sequence is 1, 6, 4+2*(6 ^1/3), 4 + 2[4+2*6 ^1/3] ^1/3, .....

Also, what is nEZ+ I am not familiar with this notation.

It does look hard. If you tell me that my interpretaion is correct then I will give it a go.

MelodyOct 9, 2013

+118725

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(4x-4)^2 = (2x+9)^2 + (2x)^2
16x ² - 32x + 16 = 4x ² + 36x +81 +4x ²
8x ² - 68x - 65 = 0

Then you have to use the quadratic formula to get the 2 irrational roots.

MelodyOct 9, 2013

+118725

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9x^2-23=0
9x^2 = 23
(3x) ²= (root23) ²
3x = root23
x = (root23)/3

This is not usually referred to as completing the square but I guess it is what you want.

MelodyOct 9, 2013

+118725

0

This is a really good question.

The inverse function is the reflection of the function in the line y=x

You can find it by swapping the position of the xs and ys in an equation

for example
y=3x+4
the inverse function would be
x=3y+4
and when rearranged this gives y=(1/3)(x-4)

MelodyOct 9, 2013

+5478

+6

so u start with:
9/16+3 5/6
first change the mixed number into an improper fraction
=9/16+18/6+5/6
simplify
=9/16+23/6
then make the denominators the same by making them their LCD, 48
this is done by multiplying 9/16 by 4/4 =27/48, and multiplying 23/6 by 8/8 =184/48
now that u have like fractions, add them together

=211/48<-simplest fraction form

kitty<3Oct 9, 2013

+5478

+11

so it it:
-1/2*2
=-1/2*2/1
cross cancel out the 1s and the 2s
=1
then add the negative sign from the beginning
=-1 <-final answer

kitty<3Oct 9, 2013

+5478

+14

can u make the question more specific?
ex: evaluate 17 when x=___

kitty<3Oct 9, 2013

+118725

0

1054-6500= 5446 BC

MelodyOct 9, 2013

+118725

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First multiply both sides by x^2
then divide both sides by 2
you will now have
0=x^3 - 216
the cube root of 216 is 6
0=x^3 - 6^3
This is a factorization that you are probably supposed to know
0= (x+6)(x^2-6x+36)
Can you finish it?

MelodyOct 9, 2013

+118725

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81 OVER 100 SECOND POWER DIVIDED BY 2

do you mean 81 / ((100^2) /2 )?

MelodyOct 9, 2013

+118725

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Do you mean find the cubed root of 240?

Just press the cubed root button then 240
On some calculators you will need to press the inv button first.

Is this what you wanted?

cube root of 240 = 6.214 (correct to 3 decimal places)

MelodyOct 9, 2013

+4

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you don't. You just do the top number divided by the bottom number

RHB4321Oct 9, 2013

+4

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First off, you want to get the r alone. To do this you can subtract the 4 from both sides. It should look like this. -12r+4-4=100-4 So you then get -12r=96, So next you divide by -12 on both sides. It will now look like this -12r divided by -12=96 divided by -12. So the final answer is r=-8
I hope this helped!

RHB4321Oct 9, 2013

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-12r+6=100
-12r=94
r=-8

GuestOct 9, 2013

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-1+(x/2) = (x-2)*4

(x/2) = 4x-7

x=8x-14

-7x = -14

x=2

GuestOct 9, 2013

Oct 8, 2013

+118725

0

x+3y=-5
First you need to be able to recognise that it is a line
then
The easiest way to graph it is by working out 2 points
Graph them and then draw in the line
If you choose x=0 you get 3y=-5 so y=-5/3 (0,-5/3)
If you choose y=0 you get x=-5 (-5,0)

MelodyOct 8, 2013

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