01/31/13

hi how can i solve it ?-2x+3y-12=0i know that x*y=90
i don't know how to solve it ?
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01/31/13

Is wikipedia now a reliable source to use for academic papers?
I was wondering if I can use wikipedia as a source now that it's so big.
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01/30/13

Use substitution to solve x=4y and 2x+3y=44
Using substitution to solve
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01/30/13

Change decimal to fraction
How do I change a decimal to a fraction
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01/29/13

Can you help me with a math word problem?
The ratio of Jim's money to Peter's money was 4:7 at first.  After Jim spent 1/2 of his money and Peter spent $60, Peter had twice as much money as Jim.  How much money did Jim have at first?
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01/29/13

(y^9)(2y^2)^3
The number following the ^ is an exponent.
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01/29/13

Help me.......
Let a balloon in the Space means space having no air or any external force, a balloon is filled with a higher energetic particles of gas, the structure of the balloon  is just like a... more
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01/29/13

give the answer in 5 second!
let x=(1000000000000000000001)20 then, under root x2+x is equal to what?   only for genius !
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01/28/13

Define a variable and write an expression to represent the number of tents needed.
A camp leader figures that she needs one tent for every three campers, plus a tent for herself.
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01/26/13

Find domain if f(x)=sqrt 2x+6
Find domain if f(x)=square root of 2x+6
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01/24/13

2sinxcosc-cosx=0
Find all solutions 
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01/24/13

Is glass a liquid?
Someone please help with this question for my chemistry class. Is glass a liquid? 
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01/22/13

Probability Question
One card selected randomly from deck. Find odds against drawing a spade greater than 2 and less than 9
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01/17/13

what does the sublevel designations s, p, d, and f specify with respect to the atomic orbitals
what does the sublevel designations s, p, d, and f specify with respect to the atomic orbitals
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01/17/13

Find the point besides the origin where the graph of xy=x+y^2 has a vertical tangent
It's Calculus. Implicit differentiation is used. 
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01/17/13

How do you simplify the following expression by adding (x+2y)(x+2y)
I need help adding this expression I need an example to help.
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01/17/13

A+A - 3A= -2A+22
A + A - 3 A = -2 + 22  
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01/15/13

greatest common factor of 11 and 33
i need help on math 
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01/15/13

1s2 2S2 SP5
1s2 2s2 2p5 what element is represented by the electron configuration
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01/15/13

help me please
What quantity of 75 per cent acid solution must be mixed with a 30 per cent solution to produce 945 mL of a 50 per cent solution?
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01/14/13

Find two different sets of parametric equations for the following equation: y= (1/(x^3)) I need the answers to this.
I have the answers {x=2t, y=(1/8t^3) } and {x=t, y=(1/t^3)} If I have the wrong answers could you explain how to get the right ones? I have to answer this in class tomorrow and I'm insanely... more
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01/14/13

I need help finding area
triangle Help
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01/14/13

find x in the equation x=2^x+6
solve for the value of x in the equation x= 2x+6  
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01/11/13

Why must the determinant of a matrix with integer entries be an integer?
My answer would be because it involves only addition, subtractions and multiplications, no divisions. But I am not 100%sure. 
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01/08/13

name the sets of numbers to which the given number belongs v144
and simplify the given expressions, 1. (11x² + 3x + 19) + (6x² - 18x - 8) 2. (13x² + 6xy -12y²) - (9x² - 4xy) 3. -2xy(3xycubed - 5xy + 7y²) 4. (11 + √3) (4 - √11)
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