ricom39

1 Questions
19 Answers

0

1016

3

+42

old algebra

Write 10+sqrt(84) in the form (a+b)^2

ricom39 Mar 15, 2012

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1% = 2,37 (divided through 100)
34% = 34 x 2,37 = 80,58

ricom39Oct 11, 2012

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5^(-4) or 1/(5^4) or 1/625
Divide: subtract the exponents, so 9 - 13 = -4

ricom39Oct 11, 2012

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I think your problem is not complet.
It should be: 6x^2 - 54 = 0
So my solution will be:
6x^2 = 54
x^2 = 9
x = 3 or x = -3
S = {3, -3}

ricom39Oct 11, 2012

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Suppose the shadow x feet
Then 16 : 6 = (12 + x) : x
16x = 6 (12 + x)
16x = 72 + 6x
10x = 72
x = 7,2 feet

ricom39Aug 8, 2012

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no calculator needed:
divide both sides through 4
you get x+1 > 4
x>3
simpel?

ricom39Jun 12, 2012

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(a+b)(x+y) should be right

ricom39Jun 12, 2012

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The right answer is:
if x < ½ then -2x + 1
if x > ½ then 2x - 1
if x = ½ then both are right, no differance

ricom39Apr 9, 2012

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P=U.I I=U/R hence P= U^2/R and R=U^2/P

So R = 119.3^2 /144 = 98,8 Ohm

ricom39Mar 27, 2012

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My solution: (a+b)^2= a^2+b^2+2ab
10 + sqrt(84) = 10 + 2 (sqrt(21))
so: a^2 + b^2 = 10 and ab=sqrt(21)
solution: 7 + 3 = 10 and sqrt(7)*sqrt(3)=sqrt(21)
My answer is: (sqrt(7)+sqrt(3))^2

ricom39Mar 22, 2012

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Can nobody solve this problem?

ricom39Mar 21, 2012