03/24/15

Use Cramer's Rule to solve the system
x + 4y -3z = -8 3x - y + 3z = 12 x + y + 6z = 1   det A=? det Ax=? det Ay=? det Az=?
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03/24/15

x^2-2x=8y+23
Write its equation in standard formSketch the graphFor Parabolas, identify the vertex, focus, directrix, and axis of symmetry. For Circles, Identify the center and radius. For Ellipses, identify,... more
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03/24/15

9x^2-4y^2-72x+8y+176=0
Write its equation in standard formSketch the graphFor Parabolas, identify the vertex, focus, directrix, and axis of symmetry. For Circles, Identify the center and radius. For Ellipses, identify,... more
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03/24/15

How many times do we need to toss a bias coin?
Suppose we have a biased coin, with a probability p of coming up heads and q=1-p of coming up tails on any given toss, but we are not given what p or q are. We know from class that the expected... more
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03/24/15

Use Cramer's Rule to solve the system (write your answer in the lowest term)
x + 4y -3z = -8 3x - y + 3z = 12 x + y + 6z = 1   x=? y=? z=?
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03/24/15

If 85% of a class got an apple, 80% an orange, 75% grapes and 70% a banana, what's the smallest percentage who ordered all four pieces of fruit?
I need it solved quickly!
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03/24/15

Find the determinant
| 1 -1 3| |-1 2 -2| | 2 -2 4|
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03/24/15

Evaluate AB when
A=-2,2     0,-4     1,6 and B=-4,7,1/4           0,5,2
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03/24/15

Evaluate 1/3k+4/3 j when
J= 2,2     7,1/3 k=1/4,4     5,2/3
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03/24/15

Evaluate x-y when
X=-7,4      2,-5 and y =-5/2,-12/3            2,-1
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03/24/15

Evaluate c+d when
C=2/3,6      4,-3/4 and d= -4/3,-5           -2,-1/4
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03/23/15

Find the inverse, if possible
A= [1 0 2]      [ -1 2 3]      [1 -1 0] (the brackets should actually be connected together) First row=? second row=? third row=?
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03/23/15

What is the sum of a 34-term arithmetic sequence where the first term is 14 and the last term is 146?
What is the sum of a 34-term arithmetic sequence where the first term is 14 and the last term is 146?Choose one answer. A. 2,550 B. 2,720 C. 2,890 D. 2,982
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03/22/15

system of equation
x^2 + y^2 + 2y = 32 x + y + 2xy = 22find x and y :)need clear solutions :)
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03/19/15

Probability
An urn contains white balls and red balls. If Juan chooses balls at random from the urn, what is the probability that he will select white balls and red balls? Round your answer to decimal... more
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03/18/15

When finding the sum of the arithmetic sequence 4 + 1 + -2 + -5 + -8 + -11, you will have a step of work that contains the number -3. Use complete sentences to
When finding the sum of the arithmetic sequence 4 + 1 + -2 + -5 + -8 + -11, you will have a step of work that contains the number -3. Use complete sentences to describe how the -3 was calculated... more
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03/18/15

i need help solving a math word problem
Harry's publishing company wants to design a page that has a 0.75 inch border on the left, a 1.5 inch border on the top and borders on the bottom and right of 1 inch. the borders are to surround 40... more
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03/18/15

Find the z-value for which the probability that a normal variable exceeds M + z(s) equals:
 (a) .05000 (b) 0.3300 (c) 0.0980 (d) 0.3015 
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03/18/15

For a normal distribution, find the probability that a measurement is
For a normal distribution, find the probability that a measurement is: (a) more than two standard deviations above the mean (b) more than two standard deviations below the mean (c) more than 1.67... more
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03/16/15

Which figure has a greater area? To the nearest tenth, how much greater is the area?
A math teacher draws an equilateral triangle with radius 6 inches and a square with the same radius. 
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03/16/15

3rd condition to determine a Circle
Find the equation of a circle touching the x-axis and passing through the points (7, -2) and (0, -9)Ans:x^2 + y^2 - 30x + 34y + 225=0 andx^2 + y^2 - 6x + 10y + 9=0need a solution for these :) thanks
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03/16/15

3rd condition to determine a Circle
Give the equation of a circle tangent to a line 3x+y-2=0 at (-1,5) and with radius equal to sqrt10.Ans:x^2 + y^2 + 8x - 8y + 22=0 andx^2 + y^2 - 4x - 12y + 30=0 need a solution for these :) thanks
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03/16/15

3rd condition to determine a Circle
Find the equation of a circle passing through (-1,6) and tangent to a lines x-2y+8=0 and 2x+y+6=0 ?Ans:x^2 + y^2 - 2x - 34y + 165=0 andx^2 + y^2 + 6x - 10y + 29=0need a solution for these :) thanks   more
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03/16/15

I want to prove this equality. tan(p/7) * tan(2×p/7) * tan(3×p/7)= v7
I want to prove this equality.   Please help me. Thanks a lot.   tan(π/7) * tan(2×π/7) * tan(3×π/7)= √7
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03/15/15

13. Tommy is able to depreciate the value of machinery as part of his income tax return. If he has a tractor valued at $50,000 that depreciates at a rate of 12%
This question is kinda confusing. I need a little help.
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