02/27/17

can i have this one with steps please?
Find the center and the radius x^2+6x+y^2+8y+9=0
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02/27/17

sin(6x)+sin(x)=0
 Needs answers between [0,2pi). solutions in radian answers
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02/27/17

Trigonometry sin^3(x) + cos^3(x) * tan(x)
Let f(x) = sin3x + cos3x (tan x)   Show that f(x) = sin x   Thank you for your time!
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02/17/17

Partial derivatives (multiple parts)
Let g(x,y)=(xy)^(1/3). a. Is g continuous at (0,0)? I put down yes since it's not undefined there.   b.Calculate ∂g/∂x and ∂g/∂y when xy≠0. This wasn't too bad and pretty straightforward. I... more
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02/17/17

Gradients of a function
Here's the question: Find the most general function f:R^2 --> R such that ∇f(p)=p for each p∈R^2.   So, I'm guessing this means that I just need to find a function of x and y such that the... more
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02/16/17

How to do this integral
∫ (1)/(sqrt(52x -1))dx    Please show me steps. Im having a hard time figuring this out
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Cal

02/06/17

Converting a rieman sum to definite integral
∑ (1)/(sqrt(4n2-i2)) 
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01/31/17

Geometric series
The first and the last terms of a geometric series are 2 and 2048 respectively. The sum of the series is 2730. Find the number of terms and the common ratio.
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01/30/17

Can anyone help with a limit question containing cosine?
I need help finding the limit of x as it approaches 0 for (cos(x+(pi/3))-(1/2))/x.  I feel that the first step is reducing the equation to: ((cosx*cos(pi/3) - sinx*sin(pi/3))/x) -1/2x
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01/30/17

Base numbers
convert 54 to an equivalent number in base 3 
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01/23/17

Length is independent of parametrization
Length is independent of parametrization: To illustrate that the length of a smooth space curve does not depend on the parametrization you use to compute it, calculate the length of one turn of the... more
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12/30/16

Solar System Model
I'm doing a solar system model project where both the distance from the sun and size of the planet have to be on the same scale. For the background of my model I've cut 100 squares of black paper... more
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12/12/16

Think about R the set of real numbers. Are there any exceptions for any of its subsets being uncountable? If they exist, what are they?
Professor says this question is a lot simpler than I think 
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Cal

12/12/16

Show that sinx is a solution of y"+y=0
 How do I do that ^
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12/12/16

Composition of relations on the real numbers.
Here are four relations defined on R, the set of real numbers:R1 = { (x, y): x ≤ y }R2 = { (x, y): x > y }R3 = { (x, y): x < y }R4 = { (x, y): x = y } Describe each relation below. (Hint:... more
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12/09/16

math problem please help asap
One of the roots of the equation 5x^2−12x+c=0 is three times as big as the other root. Find the value of c.
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12/06/16

The sum of degrees of all vertices on a graph might be equal to 5.
The sum of degrees of all vertices on a graph might be equal to 5. i dont know
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12/05/16

If f' is continuous on [a,b], show that:
2∫a b f(x) f'(x) dx = [f(b)]2 - [f(a)]2
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11/16/16

The sum of two numbers is 381. Their difference is 155. Find the two numbers.
I need help I don't really get it. I would like to know the answer. 
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11/16/16

Calculating expected value E(X^3 - X) ?
How do I calculate the expected value of E(X3 - X)? Is it equal to E(X3) - E(X)? I know the values of E(X3) and E(X) individually.   Thanks in advance!
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11/07/16

momemt of inertia
We have to find moment of inertia of a semi circular disc whose axis of rotation is passing through the centre making an angle k with the diameter and lying in the plane of disc .
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10/05/16

derivative of sin(5lnx)
I need the answer and worked out solution.
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10/05/16

statistics - normal distribution multiple choice
  The variable X is normally distributed with a mean u and a standard deviation o. Let A be a value of X. For the current values of u, o, and A it is known that P(X<A)=.4512. If the value of of... more
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09/29/16

Examples of Groups of Permutations
Find a four-element abelian subgroup S5. Write its table.
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09/21/16

Factor the polynomial x^2+7x+10 if the polynomial is not factorable write prime
if the polynomial is not factorable write prime
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