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+3147

0

[input]5(8-t)+3(4-t)=11[/input]

adminMar 24, 2012

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Guest:
:mrgreen:

GuestMar 24, 2012

Mar 23, 2012

+3147

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[input]120 * rad[/input]

adminMar 23, 2012

+3147

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[input]2+77[/input]

adminMar 23, 2012

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Supplementary angles has the sum of the two angles that equal 180 degrees, while complementary angles have the sum of 90 degrees between two angles

GuestMar 23, 2012

0

GuestMar 23, 2012

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5X+3=2
5X=2-3
5X=-1
X=-1/5 (OR) X= 0.2

GuestMar 23, 2012

0

The answer is 4.
Glad I could help

GuestMar 23, 2012

Mar 22, 2012

+3147

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f(n)=2*n*(-1)^(n+1)

f( 1 ) = 2*n*(-1)^(1+1) = 2*1*(-1)^2 = 2
f( 2 ) = 2*n*(-1)^(2+1) = 2*2*(-1)^3 = -4
f( 3 ) = 2*n*(-1)^(3+1) = 2*3*(-1)^4 = 6
f( 4 ) = 2*n*(-1)^(4+1) = 2*4*(-1)^5 = -8

adminMar 22, 2012

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GuestMar 22, 2012

+3147

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in degree:
[input]arctan(-sqrt(3))[/input]

in rad:
[inputrad]arctan(-sqrt(3))[/inputrad]

adminMar 22, 2012

+3147

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[input]5/6[/input]

[input]6* (5/6)[/input]

adminMar 22, 2012

+3147

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Paul Hands:
Could you please calculate the area of a circle with a radius of 2.54 metres

pi*r^2

[input]pi*(2.54m)^2[/input]

adminMar 22, 2012

+3147

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[input]log(13 x 7, 8)[/input]

adminMar 22, 2012

+3147

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adminMar 22, 2012

+3147

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[input]sqrt( -36/81 )[/input]

adminMar 22, 2012

+42

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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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Einstein's formula tells us the amount of energy this mass would be equivalent to, if it were all suddenly turned into energy. It says that to find the energy, you multiply the mass by the square of the speed of light, hence e=mc squared

GuestMar 22, 2012

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the common denominator of 5,4,6,3,8 is 120
5 * 12
4 * 30
6 * 20
3 * 40
8 * 15

GuestMar 22, 2012

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17.25% of 2500 is 431.25

17.25% of 2734 is 471.615

GuestMar 22, 2012

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The answer is 20.628

GuestMar 22, 2012

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GuestMar 22, 2012

+6

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In order to find the measure of an interior angle using Sine, Cosine, and Tangent, you must use the inverse (sin ^-1 cos ^-1 tan ^-1) For this problem you have to use Tan ^-1 because the measurements they give you are the opposite and adjacent sides in relation to the angle they give you. What your equation should look like at first is this: tanX=11/9.1. You then isolate X and simplify. Your problem should look like this: X=tan ^-1(1.2) Then you plug this into your calculater. Hope I was helpful

teamSOHCAHTOAMar 22, 2012

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The answer is 204.4.

GuestMar 22, 2012

Mar 21, 2012

+3147

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[input]5/6*4[/input]

adminMar 21, 2012

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