Math at eNotes
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The latest questions and answers, from members following Math at eNotes.
Thu, 29 Jan 2015 03:50:39 PST
enus

Evaluate the following expression 522(43) 522(1) 522 =50
http://www.enotes.com/homeworkhelp/evaluatefollowingexpression52243473905
Evaluate the following expression 522(43) 522(1) 522 =50
http://www.enotes.com/homeworkhelp/evaluatefollowingexpression52243473905
Thu, 29 Jan 2015 03:50:39 PST

n + 5n = 6n or n=1/6
http://www.enotes.com/homeworkhelp/n5n473960
n + 5n = 6n or n=1/6
http://www.enotes.com/homeworkhelp/n5n473960
Thu, 29 Jan 2015 03:48:34 PST

It sounds like they want you to take a stab at what you would get in 4...
http://www.enotes.com/homeworkhelp/youinvest500anaccountthatearnsinterest473990
It sounds like they want you to take a stab at what you would get in 4 years from $500 at different interest rates compounded monthly. You'll need to use the discrete compounding equation here: `A = P(1+r/n)^(nt)` Here, A is the future value of the money, P is the principle (original amount you put in, $500), r is the annual interest rate, n is the number of intervals in the year that you are compounding (here, 12 because monthly), and t...
http://www.enotes.com/homeworkhelp/youinvest500anaccountthatearnsinterest473990
Thu, 29 Jan 2015 03:36:54 PST

You invest $500 in an account that earns interest compounded monthly....
http://www.enotes.com/homeworkhelp/youinvest500anaccountthatearnsinterest473990
You invest $500 in an account that earns interest compounded monthly. Use a table or graph to find the least annual interest rate (to the nearest tenth of a percent) that the account would have to earn if you want to have a balance of $600 in 4 years.
http://www.enotes.com/homeworkhelp/youinvest500anaccountthatearnsinterest473990#1
January 29, 2015, 2:29 am PST

In order to make headway with a complex probability problem like this...
http://www.enotes.com/homeworkhelp/supposethatstudentsarrivelecturersoffice471130
In order to make headway with a complex probability problem like this stochastic process Markov chain problem, you must be certain you grasp the definitions of the important terms. To facilitate that understanding, we'll go over these definitions here. Stochastic Process The Poisson Process, named for its developer, French mathematician SimÃ©on Denis Poisson, is a stochastic process. Stochastic Process: A process that is a variation in time...
http://www.enotes.com/homeworkhelp/supposethatstudentsarrivelecturersoffice471130
Wed, 28 Jan 2015 22:38:45 PST

thanx very much for ur answer can u show me step by step differential...
http://www.enotes.com/homeworkhelp/1dxdtsgnxx002dxdtsgntx003dxdt3473976
thanx very much for ur answer can u show me step by step differential equation for first and second ? and for fourth one the x(0)=0 . and can u explain the uniqueness and existence in another way for each one of them and thank you again ali
http://www.enotes.com/homeworkhelp/1dxdtsgnxx002dxdtsgntx003dxdt3473976
Wed, 28 Jan 2015 18:41:03 PST

thanx very much for ur answer can u show me step by step differential...
http://www.enotes.com/homeworkhelp/1dxdtsgnxx002dxdtsgntx003dxdt3473976
thanx very much for ur answer can u show me step by step differential equation for first and second ? and for fourth one the x(0)=0 . and can u explain the uniqueness and existence in another way for each one of them and thank you again ali
http://www.enotes.com/homeworkhelp/1dxdtsgnxx002dxdtsgntx003dxdt3473976#2
Wed, 28 Jan 2015 18:37:29 PST

The question is asking for solutions to the given differential equations...
http://www.enotes.com/homeworkhelp/1dxdtsgnxx002dxdtsgntx003dxdt3473976
The question is asking for solutions to the given differential equations in each case, where the initial value is given (that is, they are Initial Value Problems). If a solution does indeed exist we are asked whether it is unique or not. 1) `dx/dt = sgn(x)` where `x(0) = 0` 'sgn' is the sign or signum function, which is +1 when the variable is positive and 1 when the variable is negative. So here when x<0 we have that `dx/dt = 1`...
http://www.enotes.com/homeworkhelp/1dxdtsgnxx002dxdtsgntx003dxdt3473976#3
Wed, 28 Jan 2015 17:25:32 PST

1) dx/dt=sgn(x), x(0) =0; 2) dx/dt=sgn(t), x(0)=0; 3)...
http://www.enotes.com/homeworkhelp/1dxdtsgnxx002dxdtsgntx003dxdt3473976
1) dx/dt=sgn(x), x(0) =0; 2) dx/dt=sgn(t), x(0)=0; 3) dx/dt=3*x^(2/3), x(0) =0; 4) dx/dt=1+x^2 t={pi/2 pi/2} Find solutions of the form x = f(t) where (f is a oneone function) in each case if any exist and state whether there is a unique solution.
http://www.enotes.com/homeworkhelp/1dxdtsgnxx002dxdtsgntx003dxdt3473976#4
January 28, 2015, 4:03 pm PST

Another way of solving the system of equations 2x + y = 2 ...(1) 3x +2y...
http://www.enotes.com/homeworkhelp/2xy23x2y5solvealgebraically470727
Another way of solving the system of equations 2x + y = 2 ...(1) 3x +2y = 5 ...(2) is using the elimination method. First, let's determine x by eliminating y. 2*(1)  (2) 4x + 2y  3x  2y = 4  5 x = 1 Now, determine y by eliminating x. 3*(1)  2*(2) 6x + 3y  6x  4y = 6  10 y = 4 y = 4 The solution of the given system of equations is x = 1 and y = 4
http://www.enotes.com/homeworkhelp/2xy23x2y5solvealgebraically470727
Wed, 28 Jan 2015 13:29:38 PST

The equation that you have to draw a graph of is y = (5/2)*x  4. This...
http://www.enotes.com/homeworkhelp/howgraphy52x4473798
The equation that you have to draw a graph of is y = (5/2)*x  4. This is the equation of a straight line in slopeintercept form y = mx + c. Here, the slope of the line us 5/2 and the yintercept is 4. A straight line is uniquely defined if two points that lie on the line are known. Consider the points with xcoordinate equal to 0 and the ycoordinate equal to 0. When xcoordinate is 0, y = 0  4 = 4 and when the ycoordinate is 0, 0 =...
http://www.enotes.com/homeworkhelp/howgraphy52x4473798
Wed, 28 Jan 2015 13:23:36 PST

There are correction for the solution above. It should have been :...
http://www.enotes.com/homeworkhelp/differentialfunctionfhascriticalnumbersx4473974
There are correction for the solution above. It should have been : a) Critical number of x=4 We consider f(0)=2 which is at the LEFT of x=4 and f(6) =3 which is at RIGHT of x=4. According to the first derivative test, this shows that there is a relative maximum at x=4. b) Critical number of x=9. We consider f(6)= 3 which is at the LEFT of x=9 and f(10)=5 which is at the RIGHT of x=9. This shows that there is "no sign change of...
http://www.enotes.com/homeworkhelp/differentialfunctionfhascriticalnumbersx4473974
Wed, 28 Jan 2015 13:21:47 PST

According to the first derivative test, the relative extrema can be...
http://www.enotes.com/homeworkhelp/differentialfunctionfhascriticalnumbersx4473974
According to the first derivative test, the relative extrema can be classified as: 1. Relative minimum if f'(x) = negative from the left of x=c and f'(x) = positive to the right of x=c. 2. Relative maximum if f'(x) = positive from the left of x=c and f'(x) =negative to the right of x=c. 3. If there is no sign change for f'(x) from the left and right of x=c, then f(x) is not a relative extrema of f. Solution: For critical number x=4, we...
http://www.enotes.com/homeworkhelp/differentialfunctionfhascriticalnumbersx4473974#5
Wed, 28 Jan 2015 07:07:12 PST

To support the above answer, using calculus is another way to solve this...
http://www.enotes.com/homeworkhelp/managementlargestorehas1000feetfencing473970
To support the above answer, using calculus is another way to solve this such that, from the derived equation for area in this question: `A=1000l2l^2` as `A'=0` for the maximum area and `A= 1000l 2l^2` (as explained above) `therefore A'=1000 4l` `therefore 0=10004l` `therefore 4l=1000` `l=250` Substitute: `therefore w=10002(250)` `w=500` Substitute: `therefore area = 250 times 500` Ans: Maximum Area=125 000 ft^2
http://www.enotes.com/homeworkhelp/managementlargestorehas1000feetfencing473970
Wed, 28 Jan 2015 06:51:33 PST

a differential function f has critical numbers at x=4 and x=9. identify...
http://www.enotes.com/homeworkhelp/differentialfunctionfhascriticalnumbersx4473974
a differential function f has critical numbers at x=4 and x=9. identify all relative extrema of f at each of the critical points if f'(0)=2, f'(6)=3 and f'(10)=5.
http://www.enotes.com/homeworkhelp/differentialfunctionfhascriticalnumbersx4473974#6
January 28, 2015, 6:32 am PST