09/14/14

determine the value of k for which the system has no solutions
determine the value of k for which the system  x+y+5z=-3 x+2y-2z=3 4x+11y+kz=31 has no solutions.    k=?
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09/13/14

binomial theorem
n-1 ∑           ncr/(ncr+ncr+1) equals? r=0
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09/13/14

z=F(f(x)) double function?
what's the name of this function?
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09/11/14

Reduce the matrix to reduced row-echelon form
-3 1 -3 21  2  3  3 -6 2  0 -3 3
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09/08/14

maths help
prove that none of the integers 11,111,1111,11111,... is a square of an integer
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09/07/14

A ball is thrown upward and caught when it comes back down. When air resistance affects the ball, compared with the initial upward speed, the speed when caught
i dont have any other information to give you at this time i wish i did but i just don't i am sorry for that
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09/07/14

newton's laws of motion
a bomb of mass 1 kg initially at rest explodes and breaks into 3 fragments of masses in ratio 1:1:3. the 2 pieces of equal masses fly off perpendicular to each other with speed of 15 m/s each.the... more
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09/06/14

newton's laws of motion
a 6kg bomb at rest explodes into 3 equal pieces p,q and r . if p flies with speed 30m/s and q with speed 40m/s making an angle 90o with direction of p, the angle between the direction of motion of... more
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09/04/14

lim y^2+y-12/y^3-10y + 3 as y approaches 3
a question about limit, Please i need help ! 
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09/03/14

cos^(-1) x + sin^(-1) x
cos^(-1) x + sin^(-1) x
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09/02/14

I need help determining if this a binomial distribution
A certain electronic device will operate properly if any of 3 components function properly. After extensive testing it was determined that the distribution of the number of components that function... more
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09/01/14

HELP!!! finding the domain for the square root of 2x/x^2-324
I am struggling to understand how to find the domain of a square root with a fraction   sqrt2x/x2-324 (the square root is for the entire fraction.) I get that for the denominator I need to... more
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09/01/14

Find the equation whose roots are the nth powers of the roots of the equation x2-2x cosy+1=0.
question related to higher trigonometry of bsc
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08/31/14

Select the x-coordinate of the vertex of the parabola defined by the function f(x)=-9x^2+7x+7
Select the x-coordinate of the vertex of the parabola defined by the function f(x)=-9x^2+7x+7
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08/31/14

Please help me on this question.
Write plane equation that passes A(1,-2,6) B(5,-4,-2) points and intersects Ox and Oy equally.  
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08/29/14

Given j(-2,5) and k(2,-3). Find the point p on jk such that 4* jp=pk
I would like to know how to solve it or a detailed answer so i cn use it to answer the rest of my questions.
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08/28/14

if cos (y-z)+cos(z-x)+cos(x-y)=-3/2,prove that cosx+cosy+cosz=0=sinx+siny+sinz
if cos (y-z)+cos(z-x)+cos(x-y)=-3/2,prove that cosx+cosy+cosz=0=sinx+siny+sinz
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08/27/14

Stuck on physics rotational motion question.
The tires of a car makes 65 revolutions as the car reduces its speed uniformly from 80km/h to 30km/h. The tires have a diameter of 8.0m. What was the angular acceleration of the tires?   I know... more
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08/27/14

the function f(x)= integration of sqrt of (1-t^4)dt from 0 to x such that :
A)it is defined on interval[-1,1] (B)it is an increasing function (C) it is an odd function (D)the point (0,0) is point of inflection
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08/25/14

I can't understand how the infinity concept plays into this.
The value of the infinite product: 2^1/5 * 4^1/25 * 8^1/125 * 16^1/625 * ... can be expressed in simplest radical form as the nth root of a to the b power. Compute n+a+b.   I got up to the point... more
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08/25/14

Trigonometry - Bearings
2 hikers set out from the same campsite. One walks 7km in the direction of 043°T and the other walks 10km in the direction 133°T. What is the bearing of the first hiker from the second?   I can... more
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08/21/14

Probability Question
If you roll two dice (a green one and a red one), how many different outcomes are there for that roll? (in other words, how many different combinations could you get on the two dice)? 
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08/18/14

A body is thrown up with a velocity of 100m/s if it travels 5 m in the last seconds of its journey . If the same ball is thrown up with the initial velocity of
A body is thrown up with a velocity of 100m/s if it travels 5 m in the last seconds of its journey . If the same ball is thrown up with the initial velocity of 200m/s . What distance will it travel... more
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08/17/14

The least and greatest
The least and greatest numbers in a list of 7 real numbers are 2 and 20, respectively. The median of the list is 6, and the number 3 occurs most often in the list. Which of the following could be... more
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08/15/14

Value(s) of x where the value of y=xLn(2x) is an extremum. Round x to 4 decimal places. State whether the extremum is max or min.
I'm confused on how to set this up. Professor had said to take the inverse function of ln(x)  which would be e^x but what do I do with that 2 or that extra x?
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